FSE

Furry search engine

formerly SoFurry search engine

Loud grunts and clashing steels, all poorly covered by some strangely-placed bubblegum pop by the speakers, such a scene was a common thing one can hear in a gym, especially so in a gym like this where men of all sizes hone their bodies freely. From the meekest beginners, to the experienced regulars, to even the towering macros and mega-macros, the Onyx Crucible was a place for all sizes to train and hone their bodies further.

One such individual was on his final exercise, an average-sized pitbull named Ferix. The toned canine was scowling, facing his reflection as he steadied himself for his final reps of chest flys. Almost breathless, he brought his arms together for the final rep, his chest and arms burning as he held that rep for a few seconds...three...two...one!

"HAAH!" He finishes it with a loud yet tired scream, dropping the dumbbells on the padded floor. He took deep, painful breaths, watching his sizable pecs rise and fall for every breath. He let a smirk decorate his face as he brought his arms together for a flex, watching his tight tank top get pushed by his own muscles.

"Alright, that's good enough..." He mumbled before shaking his head and standing tall, still watching his lean reflection. Even after all that work, that familiar feeling in his gut bubbled once more as he kept looking. He scowled as he did his cooldowns, ignoring everyone else as he felt his toned physique all pumped up, yet still smaller than he wanted. He accidently caught a glimpse of other people, seeing the same guys working out and having more progress than him...it all made him drown in his own helplessness.

Ferix breathed out harshly, grabbing his bottle and marching towards the lockers with a scowl, ignoring everyone around him a single question lingered in his mind.

"Why can't I get bigger already..."

Ferix has been working out for a few years, wanting to cultivate a strong, muscular body that he could use to defend himself and fight back if ever, a lesson that he had learned the hard way back then. And so for a couple of years, it was going good; his skinny body grew into a leaner, toned body that he was proud of, his strength rising for every inch gained in his arms and chest, and he can't help but flex in front of his mirror at some times, pride swelling in his chest.

Yet after that, he noticed his growth had...stagnated. His beginner's gains had run out, and he began struggling to even gain a few pounds despite all his attempts of bulking up, causing him to stabilize at a measly 135 pounds. Even working out here in the famous Onyx Crucible was pretty useless, and now the pitbull had to look at all these other people gaining and bulking up, all while he was stuck in a rut that he can't get out of.

Ferix sighed as he entered the locker room, thankful that it was empty in this section, not counting the two towering macros chatting by their section. They all have bodies that would rival bodybuilders if ever they were at a non-macro height, such strong, powerful muscles, and if he was hearing right, they haven't even worked out yet; those muscles were still not pumped.

He took another glance downward at his body; it was decent, fit for a model. A lithe physique that would make people envious especially when he's pumped like this, but he wanted more, to be a hulking canine with muscles far larger than possible.

"Maybe I should buy those products..." He whispered, wandering towards his locker, taking quick glances towards the two giants still chatting away. One other reason he had joined this place was its sister company: the Onyx Labs. Famous for its incredibly potent growth supplements, he wanted to see first-hand just how effective these things are, and true enough, the testimonies were all positive; it all worked out for them, and yet...

It's just...the pitbull had been burned out from all the fake products he had once tried, wasting so much money just to get little to no results; one of them almost got him to the hospital. At this point, he had truly believed that he was just unlucky, that he was stuck in his lithe stature, that even an Onyx product won't help him achieve even a small boost to his body.

Ferix sighed, his mood had truly sunk six feet deep as he opened his locker, wishing that he finally had some sort of lucky break, or maybe a late growth spurt of some sorts, or maybe just enough courage to buy even a single growth supplement. "I really should just take the plunge. I have enough to buy for a week, at least..."

Frustrated, the pitbull grabbed his towel and walked towards the showers, wishing that there was some way that he could have a bit of those products, have a taste of that rumored Onyx Labs science and grow like those macros without spending his money, without feeling like he wasted a lot, just to get the same results...

He sighed. "Maybe there really is no hope for me. It's not like there would be...something...that could...help...me."

Ferix slowly stopped, eyeing the gym's announcement board, a staple of this place. The usual flyers of bodybuilding competitions, new product announcements and even some odd job hiring are here to be seen by everyone curious enough to stop by, but one in particular made his eyes widen.

"Is that...?" The pitbull gently plucked the flier off, reading it once and twice just to make sure. The little Onyx Lab's logo was unmistakable, and reading the message made him even more excited as he realized what this flier was announcing.

"This...this is a Kyoju experiment..." Ferix softly whispered, his tail uncontrollably wagging at that realization, especially so once he remembered just how significant that name is around here.

Right, Kyoju. How could he ever forget anything about that guy, especially with how often the others wait for his experiments. Experiments that would have test subjects grow far, far larger than naturally possible, from massive hunks beyond the size of bodybuilders to giants comparable to buildings, mountains even, and rumored to be even more. With how long he's been here, he was starting to think it was just some urban legend conjured by the many, hopeful patrons in here.

But now...now, he has it in his hands. Not just proof of its existence, but this could also be his key to finally break through his years-old slump, to be the biggest canine that he wanted to be, without spending his money.

Still...

"Still...what if it didn't work..." There were doubts lingering in his mind, the horror that even an experimental drug as strong and as infamous as this was still not enough, will still fail him. Would he risk it? Would he let himself be disappointed again?

Before he could bring the flier back, he heard the rumbles from behind him. Knowing what caused it, he turned back at the two macros, standing at an impossible thousands of feet tall and thousands of tons heavy, and he can't help but imagine himself being as tall as them if ever he joined the experiment...no, even taller than them, towering over those two so easily and maybe...maybe even more...

"...fuck it." The wolf immediately listed his name among the others, conflicted feelings mixing in his stomach as he stomped towards the showers, the cold water not enough to wash away both his doubts and excitement.

On one hand, this could just not work at all, and he would eventually go back to cursing his body of his for not being receptive to literally anything that should help him grow. Not even considering that he might not even get chosen for this experiment at all; there were a lot of names in there, all better candidates than him he's sure.

But...but if he was chosen...and if this worked...Ferix shivered, and not from the cold water. If it all worked, he could enjoy being a couple sizes larger than he was; even a small boost is enough to satisfy him at this point. He just wanted to be bigger, and if he's gonna risk being disappointed, then so be it.

That determination didn't stop him from being anxious waiting for the call, practically on edge for any call or text or whatever that will tell him that he got in or out. He even asked one of the trainers about it; a large, black dragon chuckled, saying not to worry about it and just wait, which ironically worries him even more.

But maybe he should have believed that trainer, because a few days later, he finally got called by someone from Onyx Labs. As he listened to the kind voice, his face full of worry was replaced with a rare bright smile, his shoulders finally relaxed as he received the good news.

His appointment for Kyoju's experiment was in a couple of days.

***

The hallways of Onyx Labs was noticeably different than that of the gym despite its pretty direct connections. It makes sense, really, as this was a far more professional setting than the lax environment of the Crucible. The excited pitbull, fresh out of a college class, walked as quietly as he could muster as he traversed the halls, a destination in mind.

With a visitor ID hanging by his neck, the pitbull was wearing the best attire he could; a loose, plain blue shirt and some pants, his bag that had a lone textbook still on his shoulders. As he continued to walk along, he prepared himself for meeting the legendary Kyoju, a good way to distract himself from his nerves.

"Then again, what DO I know about him?" He mumbled, trying to recall what any info he had gleaned from his time in the Crucible. The patrons of the gym mostly only know of him because of his experiments; apparently Kyoju actually showing up to the Crucible was rare enough as it is due to how busy he is. Those who were Kyoju's previous test subjects were out of reach, figuratively and literally, since they now stood hundreds or even thousands of feet above the canine. The trainers were the closest to the bull apparently, but all they talked about was how his experiments usually caused a lot of property damage, and that he took a few of his own concoctions himself.

"I guess that means he's huge, right?" He concluded, a mental image of a tall, jacked bull had conjured into his mind, just in time as he reached the bull's office door. A little plaque reading 'Kyoju Redmane' was placed there against a set of large double doors, the size a bit intimidating for the pitbull. Still, the canine knocked on the door, waiting for a bit as he let his mental image of Kyoju be in the forefront of his mind.

"Just relax, Ferix." He mumbled to himself, adjusting his bag, smoothing his clothes for the nth time. "Imagine it's just like a regular visit to the doctor, except the doctor is jacked-"

He stopped when he heard heavy thuds coming from the room, moving closer and closer towards the door. The mental image he had of the bull was flickering now, not expecting such heavy steps, and was immediately shattered when a giant, hulking bull, both taller and wider than the door frame emerged.

"Hmm?" The bull rumbled, his voice so deep as he looked down at him. Ferix gulped when he had to tilt up just to look at the massive slab of bull pecs stretching his poor button-down, and even more just to see a surprisingly handsome face smiling at him over those massive pectorals. "Ah, you must be Ferix, correct?"

Ferix slowly nodded, still in disbelief as to what he was seeing. Kyoju wasn't just big, he was HUGE! The bovine doctor could barely fit even through the double doors, his bulk quite beyond what a bodybuilder could be even at his height. His lab coat was stretched to near tearing, sleeves pushed to its limit despite his relaxed stance. The bull chuckled, clearly amused at his reaction, before introducing himself with his friendly, deep voice. "I am Doctor Kyoju Redmane, a head researcher of Onyx Labs, though I assume you already knew."

Ferix was still speechless, still reeling at the sheer size of the doctor. It took him a few seconds to keep himself steady, just before he shakily introduced himself. "Ah, m-my name is Ferix, s-sir Kyoju...I'm, uh...I'm here for the experiment, sir."

"Ah, so you are." Kyoju smiled, slightly easing the canine's worries, though he had to step back a bit as the bull hunched over slightly. "It is nice to meet you, Ferix."

Kyoju reached out for a handshake, a massive mitt reaching towards the canine, who shakily accepted it. Ferix had to stop gawking at the sheer size difference between the two; his paw was practically gone, enveloped by such a massive mitt that could grasp around his own torso fully.

The paw shake lasted for a while, enough for Ferix to finally calm down by the time he retracted his paw, eyeing the doctor who loomed over him. His initial shock and fear was replaced with awe and wonder as he saw the entire wall of beef standing, such a powerful and intimidating presence and yet still relaxed, a casual showcase of might.

This...this was the body and size he wanted, what he craved. Such effortless strength, a towering frame brimming with power; suddenly, he was a firm believer of the power of those products, and he couldn't help but tremble in excitement as he's about to be a test subject for one.

Kyoju must have seen him because he chuckled so deep yet friendly as he gestured back inside. "Now let's head inside, shall we?" Ferix nodded as he saw a ghost of a grin dancing on the doctor's lips. "You do have an appointment to attend."

Ferix nodded, infected by the doctor's excitement as he marched towards the double doors, the bull behind him. He was expecting the place to be quite barren or maybe just filled with various scientific apparatus, but was surprised when the place looked...normal. Shelves full of books thicker than his college textbooks on one side, a whiteboard filled with scientific babble on the other. With the potted plants at the corners and a few picture frames all over the room, the place looked normal.

At least, in a glance, before he realized that the office was far spacious that it was, so much space in between furniture that are already upsized from their normal counterparts; all of this was probably to accommodate the massive occupant, but all of this made him feel even smaller than usual.

The desk was, again, far larger to accommodate the occupant, who immediately sat down on his side of the table, his chair now gone from his view due to how large the doctor was.

Kyoju gestured towards the leather chair on the other side, a seat that Ferix could use as a cot, with an inviting smile, his eyes gleaming. "Please take a seat, Ferix."

The pitbull nodded, finding himself miniscule against the chair as he sat down, his bag beside him. The bull brought out a stack of papers and regarded him with that friendly smile. "Good. Well if you've settled in, then let's begin. We have a lot to discuss before we move on with the experiment."

And a lot was right. To be fair, the pitbull was expecting a full-on hour-long seminar before they could get started, so he was ready to receive such. Fortunately, the bull was nice enough to just summarize the important parts of his spiel, a few of them being that Onyx Labs is responsible for any destruction he may cause during the growth, that the Labs will support him financially due to his new size being troublesome to his life (the idea of which excites him further), and that the serum is administered through injection (which cause his excitement to die down).

What caused his excitement to really drop, however, was what he had to do afterwards: sign some waivers. The canine sighed as he scrutinized each line on every page, a habit he got after visiting too many sketchy sites selling even sketchier products. After a few more lines, he looked up and caught a glimpse of the massive bull on another part of the room, grabbing something from an equally massive and fancy-looking fridge. That thing could tower over him and yet the bull rose higher, and he had an inkling there weren't any regular food products in there.

As he goes through each paper, a thought keeps appearing at the forefront of his mind, a question that he REALLY needed to be answered. He looked up from his task, just in time to see Kyoju retrieving a syringe filled with something green, and after a few seconds, finally croaked out his question.

"Uh...sir Kyoju?" The bull hummed in response, and Ferix took a deep breath before he moved on. "I-if it's not too much trouble, may I ask...how big will I be after this?"

Ferix flinched when Kyoju turned to him slowly and just...stared. The bull's red eyes seemed to look past him, past his skin and fur and into his mind and soul; a stare so intense that would make others quiver, and yet Ferix silently stood his ground, his eyes burning with determination.

It wasn't after the bull chuckled did he relax, his shoulders slumping as Kyoju's deep voice rumbled. "It depends, really. Quite a lot of factors are in play here, including individual genetics and such, so it always relies on mere educated guesses." He said with a smile, waving the syringe, as if he was taunting him. "With this one, however..."

Ferix gulped, watching the same ghost of a smirk dancing on Kyoju's lips once more, staring at him with strangely mischievous eyes. "This particular one was improved significantly from my previous experiments, so even in the worst case scenario, you would grow quite massive."

Ferix was quiet for a moment, but he couldn't help but ask another question. "...h-how massive, sir?"

The bull stared at him again, and this time that smirk was fully realized as he answered his question, finally. "Massive enough to tower over me, Ferix. That seems to be an ideal size for you, yes?"

The canine almost dropped the pen, his mind stopped working for a split second before suddenly overloading, thoughts flying a mile a minute. Larger than Kyoju himself... if that was true, then that would mean he'll be...

"Just for reference," Kyoju mused. "I'm 8'3" and almost 700 pounds."

Ferix had stopped listening to the massive doctor, only focused on finishing his task as quickly as he could. He heard the bull chuckle, moving closer with the syringe in hand, and the sight caused Ferix to tremble. He managed to finish quickly, a signal that he was ready to take this experimental serum as soon as possible.

He did admit that he was scared at the sight of the hulking bull holding a syringe, but Kyoju was surprisingly gentle despite having fingers that are comparably thicker than his forearms. Once done, he could feel his arms numbing and he was excited to feel something else coming, like his clothes straining against his new bulk, or his frame stretching to accommodate his incoming size...

...but none of that happened, nothing happened for a minute...two minutes...five...ten...

"Hmm...interesting."

"What is?" Ferix asked, a bit worried that it really wasn't working on him. He looked back to the doctor and spoke with a worried tone, his fears slowly coming back. "Is the serum not working for me?"

The bull hummed for a moment, eyes focused on his notes turning to him with a kind smile. "You feel the numbness on your arm, yes?" Ferix nodded, causing Kyoju to chuckle. "Then there's no need to worry. A few subjects have had a delay on theirs as well, some even took half a day before it worked. So this is a normal, albeit rare occurrence."

Ferix can't help but sigh in relief, rubbing his left arm to ease the numbness a bit. He heard the bull chuckle and felt a bit embarrassed for getting worried there. Still...

"Um, sir Kyoju? Is there anything I should do, then?"

The bull looked at him with a gentle knowing smile before chuckling, dropping down his notes and leaned on his desk further, his frame looming over the canine. "My suggestion, Ferix? Go home for now." The suggestion took the canine by surprise. Shouldn't he stay here for any further examinations? What if the serum works just as he was going home and he grows in public?

The massive doctor chuckled before continuing his spiel with a mirthful grin. "The experimental dose is taking its time with your body, as I've said. It would theoretically take hours for you to fully feel its effects." The bull sighed. "And as much as I want to wait and watch, I have another appointment to attend. But if you want, you could stay here for the next few hours. I'll have someone check up on you regularly as well. How about it?"

The canine was about to say yes, but as much as he wanted to stay, he did have a few homework he needed to do, and he reckoned that waiting around the lab would be boring. Then again, if public growth was his only concern, Kyoju did say that any destruction he caused will be theirs to pay...

He nodded to himself before shaking his head, making sure not to feel flushed as somehow his thoughts turned to him looming over the entire college, peeking through the windows to take his lessons. If ever Kyoju noticed his burning cheeks, he didn't say, but there was a certain mirth painted clearly on the doctor's face as he nodded.

"Then you can go ahead, then. Just remember what we've discussed earlier, okay?" The bull pulled out something from his drawer and deftly gave it to Ferix, who took it gently before looking at it, flipping it around; it was a business card. The design was surprisingly simple, the Onyx Labs logo on the corner with Kyoju's name and contact number.

Said bull continued talking. "If you haven't felt anything at all in the next 12 hours, then give me a call for further instructions, okay?"

"Thanks, sir Kyoju..." Ferix mumbled, pocketing the card pensively. The worry he had before came true, and all he could do was just wait for hours. The canine said his goodbyes to the hulking doctor and was about to head out when...

"Maybe..."

"Hmm?" He turned around to see the doctor grinning. This wasn't the first time he saw him grinning, but there was something...more to that smile. "Is there something else, sir Kyoju?

"Hmm? Oh, nothing." Kyoju chuckled, his grin wide. "It's just...most people who experience quite a delay in their serum usually grow to tower mountains, at least." Ferix stood straight at that, his short tail wagging nonstop as the bull continued. "Makes me wonder how big you'll end up."

Ferix was practically foaming at the mouth at that thought, his head creating so many scenarios of him just towering over everything, before being broken by the warm chuckles of the doctor.

"Hope that eased your worries a little bit, Ferix." Kyoju said, his deep voice comforting for the pitbull. "On a serious note, it'll be fine, so just relax. Can you do that for me?"

The pitbull nodded, a smile on his face, mumbling a low 'thanks' before leaving the room slightly feeling better than earlier, though the numbness in his arm never left. "That's a good thing..." He mumbled, rubbing his left arm as he traversed back to the entrance, his mind flying a mile a minute.

There were still those lingering thoughts telling him that this would not work, that this experimental serum is just as ineffective as the others, but Kyoju's words managed to ease some of that worry. Maybe the assurance of being bigger than the doctor himself pushed him to believe. Either way, that left the pitbull thinking on what to do next.

"Should I go home already?" Ferix mumbled to himself, trying not to get too excited at the thought of towering mountains as he started his trek towards a random direction, his entire frame shaking with excitement.

***

The canine had decided to take a tourist trip all over the Lab; he hadn't really explored the place despite being so close to the Crucible. His reasoning was he wanted to be close to the Labs when...that happens, but hours had passed and there was still only that faint numbness on his left arm. He even decided to visit the Crucible just to look around, and despite not working out, he felt himself breathing shallowly, imagining himself as one of those mega-macros exercising, lifting tons of weight for warm-up all while standing taller than skyscrapers. And as if resonating with his desire, the numbness finally spread to his shoulders.

By the time he decided to finally head back home, the sun had already set. The moonlit journey to the station was tense yet exciting for one sole reason: the numbness of the serum was spreading at a quicker pace than he thought. Ferix was halfway to the station when almost half of his body was consumed by the numbness, his breathing deep as he tried to trudge through his journey. And now that he was on the train itself, his entire body was now wracked with it.

He had to sit down, it was just too much. He was thankful that the train car was mostly empty as he was practically sweating through his clothes. Ferix took deep breaths, an excited yet pained smile on his face as he enjoyed this sensation for all its worth, because it finally eased his worries about this entire thing.

"It's...really working..." Ferix mumbled, trying to sit up straight as a familiar feeling washed over him, a feeling that he knew after so many times experiencing it, but foreign in sheer scale. This wasn't just numbness he realized, this was a pump; a full-body pump that was slowly swelling in intensity.

Ferix waited, the familiar sights of his home city breezing past him. It should take a few minutes more till he reaches the station, but he was not focused on going home for now, enjoying this moment as he felt the first throb, the first sign of growth.

And he could feel it grace his lithe form with growing power. He looked down and saw his entire frame visibly throbbing, like a workout pump gone to overdrive. His toned physique all but firmed up into something much more impressive; years of hard work felt like nothing as he saw his muscles immediately swell, his loose shirt and shorts filling up with his growing bulk.

The canine admired this dream-like scene in front of him; his chest and abdominals pushing forwards, causing his shirt to stretch against his growing bulk as his back and shoulders widened in tandem, stretching the fabric around his upper torso.

He felt his limbs filling up with mass, his lean 14 inch arms blowing up to become larger yet still defined, passing by 16 inches and more in a short time. His legs followed suit, corded muscles thickening to give his quads that tear-like shape he always dreamed of, his calves grew fuller as he stretched his foot to relieve him a bit from the stretching sensation. The pitbull could even feel his frame stretching upward, gaining an inch or two from his measly average frame, and he couldn't help but feel in pure bliss.

"Fuck...this feels so good..." Ferix mumbled, smiling as his body kept on slowly growing, receiving all this mass he had always wanted, the size he always craved. No matter how many pounds he gained, the growth still continued, the feeling just kept intensifying; the serum was just starting with him.

The brown-furred pitbull chuckled softly, his cheeks burning as his entire shirt felt tight against his new bulk. He let his paw graze, then eventually fondled at every bulge of his muscles, feeling the power underneath his stretched fur. His jutting pecs, rising a couple inches from his body, felt firm against his touch. He peeled off his shirt to showcase his abs, the faint makings of a 6-pack evolving to an impressive 8-pack, each abdominal muscle hard as bricks. Ferix slid his paws down to touch his legs, thicker thighs flexing to sizes he would never thought he would have. He slid his paws in between his thighs and melted by how powerful they are, inner thighs were touching, pushing against each other as his shorts were tearing slightly.

"Gah...keep going..." He moaned, paws once again on his torso as he felt his muscles flex and grow before relaxing, retaining all that size for the next flex...and the next...and the next...!

"Fuck...yeah...!" With a pleasured shudder, he willed his growing arms up to a powerful flex the likes he never felt, pushing his sleeves up and causing it to tear to near ruin. He saw his biceps growing rounder and fuller for every second, veins crawling against his fur as his triceps dipped lower. He felt his entire upper torso stretch wider, stretching the shirt even further than before with wider shoulders and back. His shorts weren't spared either, thighs larger than his previous size's torso ballooning even more. His previous frame, akin to a fitness model, had evolved to a bulky football player, shoulders pads included.

"Haah...haah..." The dog took deeper breaths, mostly just to feel his heavy chest heave up and down, enjoying the new weight and even bouncing them under his stretching shirt. The dog whined as more mass kept piling in, his short tail wagging as he felt his entire frame sinking against the leather seats, his width increasing to take more space beside him.

Ferix began shamelessly groping his own chest, the thought of being seen gone from his mind. Just the feeling of his biceps grinding harder against his torso, his pecs surging forward and outward out of his body, his thighs ballooning till he was bow-legged. It was then he felt his whole body lengthening, his muscles frame stretching vertically till he had passed 6 feet tall. All of these sensations were enough to forget that he was in a train, moaning and whining so loudly, his voice echoing through the train as more and more size piled up.

Ferix looked down and laughed when he saw his clothes on its last legs, trying its best to cover him up. Sadly for his old clothes, his frame was now too large to be covered by his medium sized garments anymore; even double-XLs won't fit his massive body at this point. With a quick flex, he tore down all his clothes to shreds, showcasing his monstrous frame to himself. It was so mesmerizing to see his growth, from a model to a monster that would outweigh the biggest of bodybuilders, and he still wanted even more, much more than this...

"Haah...I gotta...check myself out..." He said, pride swelling from his chest as he tried to stand up, stumbling to move with his new, larger form; his legs were longer and wider than he was used to, and having to navigate with thighs far thicker than his previous size's torso made him groan in satisfaction. As he finally stood up, he felt absolutely powerful; even without looking down, he could feel power flowing through his entire body, his chest swelled with pride and mass as his musculature gained another 50 pounds.

The growing pitbull looked down and chuckled at the sight of his own body. His pecs jutted out more than a foot away. He could barely even see anything but his furry chest, a pec shelf that one could put entire plates on. He looked to the side and saw his deltoids exploding with so much mass, muscle fibers thicker than his previous size's torso rising and falling for his every deep breath. He raised his arms and laughed even more, his voice gravelly deep as he saw his biceps peaking even when relaxed, and when he did flex the very peak of his bicep rose almost to his fists, clenched paws almost touching the ceiling just a few inches.

That made him look around, maneuvering through his own bulk as he saw how massive he had become. He reckoned he's about 7 feet tall now, and every time he shuffled he could hear the train groan against his new, still growing weight. The dog chuckled, growing into full laughter.

"This is awesome...this feels SO GOOD!" The dog smirked as the feeling became even stronger, the stretching of his bones became audible, the constant pump of his muscles was even stronger, it was like a neverending pump that kept on intensifying, so much energy flowing through him that he couldn't help...but...FLEX!

"Haah...HAAH!" The canine flexed his arms against his pecs in a show of pure strength, and he guffawed as his biceps and pectorals fought for space, steel cable-like muscle fibers grinding erotically. He felt his traps grow halfway to his ears that touched the ceiling as he grew taller once more. He had to adjust his stance to make way for his thickening thighs, already surpassing a bodybuilder's torso in width and thickness, and as he held his pose, the more he felt himself growing...and growing still!

"Just how...massive am I?" He said, relaxing his pose and crouching a bit to give himself some space, and yet he grew another half a foot taller, bumping his nape and most of his back against the metal roof. He chuckled as his entire frame can't fit on this small train anymore, his growth not stopping. The hulking canine looked around, shuffled his paws around, feeling the train creak for his every step, footfalls causing the metal floor to; he was just too heavy now. A thought came to him, a vicious grin on his muzzle.

"Kyoju said that any destruction I caused will be theirs to pay, right?" The canine started chuckling darkly, rising up a bit as he felt his massive back press against the metal roof, bars bending against his might. "Well, let's put that waiver to good use!"

With as much force as he could, he raised his right foot and heavily stomped on the metal floor, crumpling it and causing the train to lurch and stop to a screeching halt. Steady despite the chaos, Ferix heard the screams of other people from the other cars, but he didn't care about that, too focused on wanting to show off his new strength and stature. And what better way to do so than to stand tall, push against the metal roof, and flex with a loud ROAR!

"RAAAAAAAAAH!!"

The growing canine tore through the roof, his body out for all to see as he surged to more than double of Kyoju's size; standing 18 feet tall and at least a few thousand pounds of pure muscle on his frame, he was a beast to beheld, now out from this small, metal box that tried to contain him. He laughed out loud, flexing his arms as he continued to grow taller and wider and stronger than before.

A crowd had amassed around him, watching in awe at the growing canine who barely paid them any attention, too busy surveying his growing might.

"This is more like it..." Ferix said, watching his vision rise due to his growing height, before marching through the train, tearing through the metal like tissue paper until he was fully out, his massive, naked form out for the crowd to see and gawk at.

Just like the crowd, Ferix had his full focus on his still-pulsing body, his growth still going, passing by 19...23...30 feet tall, his limbs significantly powerful than any machinery as he did more poses; each one showing his augmenting might, his frame casting a growing shadow against those in front of him as his herculean frame bathed in moonlight. He took a step back, and grinned when he heard sounds of crumpling metal behind him.

He turned around at the train below him, looking more like a scrap heap that looked tempting to lift. His smirk grew into a proud grin as he realized that he could! He was a growing giant now, and growing even bigger for every second! Lifting off this hunk of scrap metal should be easy for him now!

With pride swelling on his chest, he turned around and gripped the train by the roof, metal folding against his strong paws. With minimal effort, he lifted the train car up in the air, the other linked cars joining in. Loud gasps can be heard all around him as he had done a mighty feat in front of them, but Ferix could barely hear them over his own laughter. He felt himself careening upward and outward, enough for him to grab another train car and started doing curls with them, each curl giving him hundreds of pounds in weight and dozens of inches in height.

"These things are so LIGHT!" He shouted, the soft-spoken canine had turned into an almost maniacal giant as he showed off his strength to himself, unaware of the crowd all around him. They all saw a pitbull who had continued to grow into a monstrous titan, lifting a train with such ease, a macro on his own right.

The canine watched with rising glee how the trains crumpled against his clenched paws, steel and metal felt like styrofoam against his strong hold as he easily broke the chain connecting the train cars with a simple pull, one train car on each hand. Ferix smirked at how destroyed each cart was, practically scrap metal as he tightened his grip, feeling it give out against his strength...

...before throwing one to the nearest building! The train car crashed with a loud explosion, concrete raining down the immediate area. The people ran away from both the sight and the giant who caused it, and yet the giant canine merely admired the destruction he caused, too focused on his strength and power.

"I really am stronger now, so powerful..." He stretched his arms wide, let the moonlight shine down on his mighty growing body, the lights of the city turning red and blue below him. He stood tall and mighty as the growth continued to persist; he could feel his every being thrumming with power, and it just made him grin and laugh maniacally. "I'M SO FUCKING STRONG!"

The canine stomped on the ground hard and caused a quake powerful enough to be felt all over the city, laughing at how the buildings near him all broke down by that simple action. He took powerful steps forward, watching and admiring how each building, once towering over him, now looked absolutely small against his still-growing frame, watching them shrink in real time as he passed by 50...70...100 feet tall! The pitbull was becoming a herculean macro before his very eyes!

"Let's see how sturdy these little things are!" Ferix shouted as he easily grabbed a building with one paw. With just a little bit of his strength, he pulled the building off clean from its foundation, like simply plucking a flower from the ground. The giant pitbull laughed, tightening his grasp, feeling the concrete and glass breaking against his paw before throwing the building somewhere, another crash that made Ferix laugh, clearly enjoying the destruction he was causing.

"That was AMAZING!" He shouted, his growth speeding up at his last word as he grew beyond a hundred feet tall, the concrete cracking against his enormous frame. His grew wider as the rooftops barely reached his waist, his height close to the skyscrapers a few ways from him. "Now, let's have some FUN!"

Ferix, wanting to continue this show of impossible strength, started plucking buildings off the ground, throwing them afar so carelessly. The rampaging giant was destroying the city so recklessly, doing anything just to showcase his might to anyone who laid eyes to his growing form. Police cars littered around his feet, lighting the streets red and blue; a dangerous place to be as Ferix' gigantic feet made quick work of anything, vehicles of otherwise, beneath him, crushing them all into heaps of useless metal.

The pitbull macro continued his destructive stroll through his old city, watching familiar landmarks fall before him as he kept on growing even larger than he was a few minutes ago. The buildings that were equal to his waist are now facing his knees, his musculature slowly gaining size, yet is imbued with so much strength as building after building was thrown around like stones, his size still rising.

And the best part was that he could still feel the growth continue, Ferix laughed, he's gonna be huge, massive, absolutely POWERFUL!

"Yeah...YEEAAAH!!" The pitbull shouted as another hundred feet, and hundreds of tons of mass piled up by a second, the air boomed around him, before his entire frame continued its ascent. The dog looked down, the entirety of the city in his sights; the ground looking so far away from him, lights of yellow, red, and blue so far away from his head way up near the clouds, his face full of glee as he roared at the top of his lungs.

"COME ON, MORE!! MO-AAH!!" The pitbull seized all so suddenly, a different feeling that brought the macro down to his hands and knees, his frame looming above more than half of the city. "Haah...what is happening? Is this a side effect?"

He held one paw against his head, massaging his temple to relieve the headache; the pain was so much that it felt like it was pulling his head in two opposite directions. Despite the pain, he could feel his growth speeding up, rising higher as the pain was reaching its apex,

It wasn't long before his head literally split into three, seeing triple as his face was cleanly split into three heads, the pain receding and turning into pleasure as he roared from all three of his heads.

"THIS FEELS SO AMAZING!" He roared from his original, now middle head. He stared at his two new heads, the color of their eyes darker than his own pair of light blues, yet his other's faces' expression was the same as his: filled with glee.

"MORE!" His left head shouted, just as a couple of helicopters flew around them, shining their pitiful lights against his massive form.

"MUCH MORE!" His right head agreed, and Ferix could only look around, the city looking even tinier against his growing frame. Ferix could only chuckle from his three heads as he roared with a loud, vicious roar.

"SO! MUCH! MORE!"

His entire frame exploded for every word he declared, the city looking more like a toy against his growing form, helicopters being pushed and destroyed by his hyper-muscular limbs, buildings being flattened as he rose out to the sky; even kneeling, his heads touching the clouds despite being on his knees.

Ferix felt his frame being engorged with so much mass, each bulging muscle larger than the city below him, his hyper-developed frame turning even more monstrous as the pitbull slowly stood up to his feet. Each step, every little movement of his sent the earth quaking, a titan of strength and size whose form continues to bloom outward and upward.

The pit bull roared, enjoying the sight of the clouds over the horizon, his eyes watching the earth in chaos for miles as they all saw his massive form. He could see so much from his perch, his three heads at awe, and as he felt another hundreds of feet pour onto his frame, he would see the entirety of space and its wonders as the gleeful, three-headed titan took another step forward.

The destruction he caused was much greater now that he was beyond thousands of feet tall. His mere footsteps caused deep craters against the very lands, all while he was flexing his powerful arms, accidentally swatting away any aircraft who dared come close to his engorged frame. His biceps, planetoid in size, were starting to surpass his clenched fist, his pecs surged far and wide beyond his own torso, his back and shoulders plump with muscle, wider than any valley on Earth as strong legs tougher than steel and wider than rivers supported his muscled form, all while standing taller any mountain nor building in this small planet.

The titanic Ferix roared, enjoying his growth and the destruction he casually caused as a sudden jolt in pain and pleasure shot just under his arms. The three-headed canine roared as two more arms popped up, gangly and thin at first, but mass started piling in to match his original pair.

"FUCK YEAH!!" The canine bellowed in pure bliss as he flexed his four powerful arms, his limbs crashing against each other in a fight for space that was starting to run out. His entire musculature had gone beyond being monstrous; even for his increasingly impossible height, he was too burdened with muscle, a far cry from his more proportionate form a few minutes ago, and that's exactly what he wanted and more, and he knew, he could feel it. The serum wasn't done with him yet!

"WE MUST KEEP GROWING!" His left head roared before feeling the same pain from earlier.

"MORE! MORE AND MORE!" His right head bellowed out.

"KEEP GROWING!! MORE AND MORE!!" Ferix roared from his middle head as his extra two heads split in half, making him a five-headed titan whose height made him oversee countries, continents, and the curvature of the earth itself, his heads and muscles way above the atmosphere. The colossus decided to take one step and felt the already-damaged planet crumbling away, his one paw conquering entire cities and more as it quickly expanded, flattening mountains and hills and turning into craters. His godlike muscles, already hyper-developed, surged far wider and thicker, causing his arms to grow immensely thick, his chest smothering his five heads as traps rose up significantly; his heads were nestled by his own growing bulk, muscle fibers thicker than entire countries, and he could feel his body shifting and growing even more!

The pitbull titan roared and laughed maniacally with all five...six of his heads. His limbs split into ten mighty arms with muscles bigger than the moon, stretching them to his sides as the earth beneath him couldn't hold his weight anymore, crumbling from his mighty weight and left him floating towards the void of space. Space that threatened to be filled with his own massive frame, as it kept on growing...more and more and MORE!

"MORE GROWTH! MORE SIZE! MORE STRENGTH!"

Ferix's extra heads all roared, a cacophony of voices, all his own, all demanding his body to keep growing, keep becoming stronger than possible. Even as the planet had been fully destroyed by his burgeoning weight, his body continued to grow, continuing to pile up in size that would make the largest planet in the solar system his equal. The pitbull god flexed his multiplying arms, so much mass crowding his sides, muscles grinding erotically against more muscles; it was such an erotic experience, one that just won't stop.

In a split second, he blew thrice his size, paws in reach of the sun that felt like a mere baseball, the heat radiating the star felt like nothing as he grabbed it with his many right hands and crushed it so easily. The canine bellowed out in pure, maniacal glee, continuously blowing up, sending shockwaves that traveled through the void of space, disturbing anything in its path as he kept on growing...and growing...and growing!

The pitbull roared in pure bliss, flexing as much as he could as his entire frame conquered the entire solar system, his growth still increasing, the serum working its magic as he became beyond planetary, going galactic in size with no signs of ever stopping.

His ascension continued, changes piling up; heads splitting up till he was rubbing cheeks with his own, all while being smothered by his own bulk from all sides. His arms so plentiful and powerful continued to split and surge into powerful planets of pure bulk and muscle, involuntarily flexing for every breathing he did as his looming chest surged lightyears away from his torso.

And so he continued to ascend at such a rapid rate, feeling the other galaxies shrink against his growing might, various stars, asteroids, and planets being crushed by his powerful paws. More muscle, more arms, more heads appeared to decorate his continuously evolving body that measures thousands- no, millions of lightyears, all the while a resounding chorus of his own voice, multiplied by so much, continued to scream for more, for more, for more!

Ferix laughed as he just kept on growing, even when entire galaxies felt like bugs against his stretched-up pelt, his strength rising in levels beyond what mortals could ever measure. His plentiful arms, reaching twenty or so pairs all flexed against each other, each muscle fiber thicker than any celestial object existing, his height made him tower over the universe as he grew...and grew...

And then he felt some sort of wall surrounding him at all sides. The pitbull god immediately reacted, pushing his paws, and eventually his bulk, against the solid wall surrounding him. No matter how much he pushed, it was sturdy, even with all this strength he had gathered. But his growth wasn't done yet, and he could feel his entire body still pulsing, anticipating a growth that was beyond what he had experienced.

"I WANT...TO GROW STROOOONGEEEER!!" Ferix roared, his booming voices echoing all over him as more and more power and strength was imbued to his already massively overblown frame, pushing against the wall as his body exploded with power, pushing against the wall.

His entire frame was creaking, hunching down to fit inside, and as he felt helpless, he felt a crack on the impenetrable wall; tiny as a bug, but it was there and it spread as he kept on pushing. Ferix laughed as he felt his entire musculature pulsing excitedly, laughing from all his heads as he let his entire body fill the entire universe with nothing but him, the cracks spreading until he felt it all over his colossal body.

"I'll...SHOW YOU!!"

And with multiple thunderous roars that quaked the very wall, all wielding his voice, the pitbull god flexed his godly might as light burst through from outside the wall, blinding him and-!

***

...

...

...it was surprising to remember that it was barely a day since he visited the place. Back then, the office looked and felt spacious, and with furniture so massive the small pitbull who just wanted to grow a little bit felt even smaller than before.

Now, though...

"It seems the serum worked far greater than we both expected then, Ferix."

The pitbull smirked as he crossed his arms against his naked torso, eyeing the bull with a proud grin; once a towering hulk, Kyoju now had to look up to him to meet each other's gazes. He chuckles, his three heads rubbing cheeks as he let his entire bulk flex against his crossed-out arms, the now-tiny chair groaning against his weight, his stretched out legs covered in stretched up board shorts, his tree-thick thighs overfilling it with its mass.

"You can definitely say that again, sir Kyoju." Ferix said from his left head, his other two heads still looking amusedly at the doctor's form, now not as awe-inspiring now that he was far larger; still he has much more respect for the bull, especially since he was the reason he was this big in the first place.

Or rather, much bigger than the universe.

The bull took great notes of this, incredibly interested with Ferix, who is probably their biggest test subject yet. "And so? What happens next after breaking through the universe, Ferix?"

The pitbull smiled, his two heads snickering as he answered with swelling pride. "Well, since I destroyed it, I just had to fix it. Quite easy to do, just a few snaps of my fingers and all and it was done." He said, incredibly proud of his godlike power as he flexed his arms up, bulging biceps bigger than watermelons rising high for the bull to see. "Had to squint my eyes to see it though! Was hard to see the little thing when I kept on surging bigger and bigger."

"How small was the universe against your cosmic body when you were fixing it?" Kyoju kept the questions coming, his pen gliding through the paper with finesse unheard of for his size.

"Small enough that I could barely feel it! It was barely a speck against my muscles, sir Kyoju! If only you could experience it. I was fucking HUGE!" Ferix said, grinning with his three heads as he raised his arms for a powerful flex, biceps shunting upward in a show of magnificent strength.

"Well, not on the scale you've experienced, but I do understand what you mean." The bull chuckled, taking another paper as his current one was full with scientific terms too complex for the pitbull god. "And so I assume you decided to grace us with your presence, am I right?"

"You can say that again, sir Kyoju! Wanna go and walk around the college to show off just how massive I've become, so I had to compress myself to become 'tiny'." Ferix' right head said, his emphasis on 'tiny' more of a boast of how absolutely miniscule his current size is compared to his true size, and his current size is no joke; a towering ten foot tall giant, hauling a ton of pure muscle and strength.

"Had to dismiss my other arms though, rather not be a spectacle due to my arms..." He muttered before smiling wide towards the bull, his three pairs of eyes shining. "Still, wanna see them?"

"If you would be so kind, Ferix." The bull simply laid back, his chair creaking as Ferix willed his massive arm to split into two more pairs with a blink of an eye, each limb just as large as the original.

"There we go! These are just a few from all the arms I have." Ferix declared as he flexed all six of his arms against his torso, letting his musculature explode, his gaze towards the amazed bull with a powerful grin. "Impressed, sir Kyoju?"

"Very, especially since such a side effect is incredibly rare." Kyoju admitted, and Ferix only laughed, his voice booming as he did a few more poses.

"Heh, not many multi-armed, multi-headed gods among your test subjects, sir?"

"There's a few, like I said, but you certainly are the biggest of them all." The bull said, finishing his notes before looking at the pitbull, tilting his head and smiled widely. "Well, safe to say that this experiment is certainly a success, much more than I even anticipated. So now, Ferix..." Kyoju paused, eyeing the proud, confident pitbull in front of him. "I wonder...what do you want to do next, now that you are truly a growing god?"

"Ain't it obvious? I'm gonna keep growing bigger!" Ferix said from his left head, stretching his six arms to the side before flexing it all in a show of godly strength. "I wanna see how far this growth keeps going."

"Even now I'm still growing," his right head supplied, his grin on each head wider than it could. "Won't be long till my true size reaches far greater than I am now." There was a hint in his voice that Kyoju noted and it made the bull even grin at such a prospect: it wasn't a matter of if, it was a matter of when.

"That's why," Ferix spoke through his middle head, his light-blue eyes shining as he grinned, all while his other heads brushed cheeks. "I want to know when the next experiment's gonna be! That dose was a big help and I want more of it!" His voice firm, an excited thrum deep in his chest, his short tail wagging against his puny seat. "...if that's fine, sir Kyoju?"

Ferix's smirk widened when the bull simply chuckled, his grin just as hungry as his own. "Well, who am I to dismiss such a promising test subject?"

Ferix smirked as his body, his true size, practically swelled in size, far larger than possible; his continued growth exponentially speeding up just at the thought of more growth. He stood up, bending his knees a little so his heads wouldn't bump against the ceiling. Even then, he stood taller than the bull doctor who rose alongside him, an entire couple of feet and hundreds of pounds in between them.

"Well then, I'll make sure to contact you when one comes up. You can be assured, Ferix." The bull reached out for a handshake, and Ferix obliged, letting his bigger paw envelop the bull's own paw. And as he felt his true size surge far and wide, arms and heads multiplying, Ferix could only grin.

"I'm looking forward to growing stronger, sir Kyoju."