Evolution Cocoons

Story by saaru on SoFurry

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Hey people! This is the first story that's the result of the YCHs I uploaded a couple weeks ago on my FA.

It features FA: cookie54 , a cute little snow leopard that won't stay little for very long...

Warning, weird stuff ahead. I was exceptionally horny when I came up with this idea. A little guy is eating and making cocoons to evolve into something bigger with every cocoon, which escalated quickly to macro proportions. Have a look if you don't mind the weirdness ;p

Summary:

Cookie receives a package he had ordered online, uncovers it, and injects himself with the stuff. Before reading the instructions. He ended up taking a lot more than what was recommended for his weight.... oops. And this hunger he suddenly gets is not a bad sign at all, right? I mean, he emptied a whole fridge. And made a weird cocoon in his room, where he... processed the food he ate. And then, he got hungry again, eating the whole reserves, and the family cat, and then another cocoon, and then eats his sister and her friend, and another cocoon again! And as he grows more, so does his hunger... He ends up becoming a hyper macro giant who devours everything until the planet is no more than a snack for him.


Cookie was staring down at the box he had just fetched in the mail. Thankfully, he was all alone at home and so he didn't have to go through the hassle of explaining what this package was to his family. It looked inconspicuous, and yet held a secret item that the scrawny leopard was oh so eager to discover. He went to his room, undid the wrapping, opened the box, grabbed the smaller container. Tossing the instructions down over his shoulder, he pulled a syringe containing a radioactive-green bubbly liquid.

Overeager to get started with it, he plunged the needle in his left arm and emptied the content of the syringe into himself. His whole body tingled, and after a minute or so of the weird liquid settling, the strange feeling vanished.

"So, how does it even work?" he asked himself out loud. Getting back up after fumbling to find the instructions he had tossed on the floor, he skimmed the piece of paper. "Eating enough calories to fuel the process, blah blah, get the place for the process ready, blah blah blah blah, fuck all that shit, get me to the good part. Ah, this is the part I need: get in the private space and masturbate til orgasm? Wait, That's all? The process can take up to a few hours, metabolic enhancements or mutations may happen, whatever whatever. Careful about the dosage, one millilitre for each 20 pounds the patient weighs. Wait, really?" the feline said. "I'm... eighty pounds, so I should have used... four millilitres, right?" he then looked at the syringe. "150 millilitre capacity. Welp, fuck. Ah, well, it's too late anyways. So... I gotta eat lots, right?" he said, then tossing both the instruction manual and the syringe in the trash bin of his room.

Cookie then went to the kitchen, stuffed two pre-heated pizzas in the oven. He went through the contents of the fridge and began eating, like he had been tasked to. While he was downing food and guzzling various sodas, he already noticed that balls had become as large as apples. Wondering if it was a side-effect of the serum, he ate and drank and ate and drank more. Even though he felt full, he kept on stuffing more food down his gullet, finishing his feast with the two pizzas and topping it off with a whole carton of milk.

After eating to the point where he couldn't bear to see food any longer, the snow leopard headed back to his room. He stripped naked and saw that his balls were even bigger than before. Cupping them, he realized just how much larger and how heavy they felt in his hands. Curious as to whether anything else had changed on him, he quickly checked himself in the mirror; but he was still the same: a scrawny five foot tall eighty pounds green leopard.

Shrugging, the snow leopard slipped inside his bed and completely covered himself with the blankets. It was apparently a requirement to be in a completely enclosed area when making use of the product. He peeked out and grabbed his phone to help with the ordeal before burying himself back under the bed sheets.

Cookie brought a hand to his sheath and teased himself while opening the browser on his phone to his favourite adult website. When his black horsecock had risen to full erection, he began repeatedly rocking his hands up and down the five inches, going faster and faster as he scrolled through the pornographic content displayed on his phone's screen.

Huffing, the leopard was getting close. His belly and his balls were aching, and he was starting to wonder if the so-called miracle product was a hoax that would leave him as a big-balled freak for the rest of his life. The stimulation was however stronger than his doubts about the authenticity of the serum, and he came hard. His cock began pumping liquid like a hose. It splattered all over him, and he noticed that the fluid was much stickier than normal cum. It was almost forming webs inside his sort of enclosed pillow fort. He felt compelled to aim his horsecock to places that hadn't been sprayed yet, making it shoot the sticky substance everywhere. It went on for a few long shots of cum, until his bed, covers and himself were drenched in it. The bed covers were glued to the mattress, making it look like he was encased in a small cocoon made of solidified cum.

When his balls felt empty, Cookie's stomach gurgled loudly. He brought both hands to his belly as it groaned and digested the excessive amount of food he ate earlier in a record speed, seemingly sending all of the processed calories right back into his balls. Without even needing to stimulate himself again, the leopard came once more. His brain was overloaded with pleasure, and he indulged in the feeling. The flow out of his cock was easily twice as plentiful as previously and the liquid was, this time, real cum. The shots blasted hard against him, and it felt like it was trying to completely fill the place with jizz. Due to the area being tightly closed from the encasing sticky fluid from earlier, seed had no way out and began pooling in the enclosed nest.

And then, Cookie felt his mind drifting into a half-asleep slumber. He could tell his horsecock was still pumping more cum, and that a strange but pleasurable change was happening to him, but he wasn't sure what exactly was going on. His fur and skin were tingling and seemingly absorbing the cum surrounding him. The heat permeating his little cocoon was rising higher, which felt deeply comforting for him. Minutes felt like hours for the snow leopard, whose mind was overflowing with pleasure. His body was pulsing and engorging in his cum, and it was one of the strangest, yet most erotic feelings he had ever experienced.

It slowly started to feel like it was getting particularly cramped in his little haven under the bed covers. He moved into a foetal position, and realized that his cock was still blasting cum, which landed all over his chin and snout. He smiled and licked his lips to clean them off the liquid, delighted at the salty taste of his seed.

The walls of his little cocoon were so stretched against him, and he felt so cramped in this small place that he felt like it was time to move out. His orgasm had mostly died down, though his cock was still leaking plenty of cum.

Involuntarily, Cookie pierced the wall of his cum-drenched pillow fort with a claw. With the structural integrity of his little sanctuary broken, he decided to rouse from this sort of trance he was in. He pushed his arm out through the gap, tearing the hole in the outer layer of his cocoon wide open, and then crawled out of it. He almost flopped down on the floor, breathing heavily and his mind still in a bit of a haze. It was almost like he was a newborn exiting his egg. Except that he was still covered in his own cum, and he had a raging erection. But before tending to it, there was one thing he wanted to see. He stood up and looked in his mirror. His eyes went wide at the sight. He was a whole lot more larger than before, in every regard: fit, six feet and a half tall, cock jutting up a whole foot in length, almost reaching to the top row of his ample six pack. His balls were utterly massive now; cantaloupe sized and fighting for room between his thighs.

While he was marvelling at his new self, the snow leopard heard a huge grumbling coming from his belly. His stomach was demanding food. As he had no idea how much time had passed since he started this ordeal, he didn't know if his family had gotten back yet, and he absolutely did not want to have to explain to them how he became this huge. He would eventually have to show himself to his parents, but he'd rather not.

Cookie slipped out of his bedroom and headed to the fridge in a rush. He downed all of its content in seconds, throwing everything in his gullet to satisfy his hunger. Eggs, milk, butter, meat, leftover lasagne, cheese, everything went down his throat and into his stomach.

When he felt a brushing against his feetpaws, the leopard jumped from fright. It was the cat. Cookie stared at her, then looked at the empty fridge. Then at the cat again. He picked her up and, strangely enough, the kitty looked almost lethargic. He noticed that there was some of his cum on the cat's muzzle, and that her gaze was somewhat empty. His stomach rumbled extremely loudly, and acting on a whim, the snow leopard stuffed the cat head first into his mouth. He let her slide down his throat, until the feline pet had disappeared into his gullet along with the rest of the food. Cookie was still hungry, though. He went in the storage cabinet and ate everything he could find. Boxes of cereals, reserves of milk, cans of tuna, corn, tomatoes; all went down his throat.

He eventually stopped, feeling extremely full. Then, he headed to the bathroom with the intention to clean himself off of cum. Still trying to think about how he'd explain about the disappearance of the cat to the rest of the family, his eyes fell upon the Italian shower, and thought about how great a place it would be for another nest. It was like a square with walls made of either tiles or glass, and completely enclosed from top to bottom. It was perfect. Grinning, he stepped inside, put his footpaw on the drain so that his cum would not disappear down it, and began masturbating.

Only a few rubs of his shaft were needed for Cookie to reach an explosive climax. Meticulously aiming his shaft at clean areas, the leopard was making sure to create a flawless outer layer of his new cocoon. Sticky cum splattered on the tiles, on the wall, on the ceiling and on the floor, soon creating an opaque layer all around the sex-crazed snow leopard. As soon as his nest was ready - even the drain was covered in it to prevent any leakage - his cock stopped firing the stickier fluid. He put a hand on his stomach and felt it start to digest his feast, transferring all the processed energy into his balls.

And then, his equine shaft unleashed an immense flood of cum. If it wasn't for the thick and elastic protective outer layer of his cocoon, the blasts would have pierced through the glass or the tiles of the bathroom. Losing himself in pleasure and eagerness to go through another growth spurt, the leopard witnessed the level of the fluid rise higher, getting soon to his knees, then covering his balls, shaft and finally until he was shoulder-deep in the substance. Still rocking his hands up and down his shaft, the sex crazed large cat was still firing more cum, although less than before. Cookie was slowly drifting into the same trance as when he was back in his room, the trance where his body began absorbing all the powerful nutrients surrounding him to grow bigger.

Minutes went by, with the leopard slowly growing bigger and more powerful while he was in his cocoon. He was packing up on more inches with every second, making him rise higher above the cum level. The heat from the digestion of his meal plus the sauna-like cocoon was overwhelming, his musk filled his own nostrils. His balls were growing tremendously bigger and dropping lower with the added heft. Within his own grasp, his massive horsecock was surging both in length and in girth, driving the lust-addled leopard to worship it harder and harder. Due to the increase in size of his assets, the flow of cum out of his shaft was ever increasing, making sure his body could absorb enough nutrients to grow bigger.

Cookie's head bumped against the ceiling. Instinctively, he hunched. He needed the room to grow, and grow he did. Taller, thicker, beefier, manlier. He was slowly becoming something more than he ever dreamt to be.

But then, noises arose from near him, interrupting his blissful evolution. Women's voices. Cookie felt irritated, but he knew he had to exit his cocoon early and deal with this problem. He pierced the thick membrane with his large claws and broke the shielding glass of the shower as he passed through.

An enormous snow leopard emerged. Nine feet of thick beefy feline hunk slowly exited the cocoon. His enormous shaft was reaching up to the middle of his pectorals, and his balls were so large that one had to wonder how it was possible for him to move around. The giant creature had to hunch to be able to fit in the room. He glanced in the mirror and grinned proudly at this new image of him, his belly rumbling from hunger once again.

Just as he was pulling the last inch of his fluffy tail out of his previous cocoon, the bathroom's door opened. A five feet two skinny leopard showed up and was immediately paralyzed from fear. "W-what the..." she said, catching the attention of the monstrosity.

Cookie grabbed the intruder with a single hand, lifted her up, and said, grinning wide "hi, sis."

"C-Cookie? Wh-what..."

He didn't let her finish her sentence. He opened his mouth wide around her head and stuffed her down in his ravenous throat. His jaw had to stretch wide to accommodate for the breadth of the meal sliding down his gullet. The outline of the woman was clearly visible through his body as she was gulped further. Just thinking about how much this meal would do was enough to make his cock spurt a shot of precum that splattered against the tiles of the wall.

"Bella?" another voice called.

Cookie finished slurping down his first serving, and rejoiced at the idea of a dessert. A parrot lady peeked through the doorway and squawked in fear. The giant leopard grabbed his next meal by the hips and brought her in front of himself while shutting her beak to prevent her from screaming. He closed the door, shut down the lights, and licked his lips, ready to feast once more. He shoved her in his mouth and started gulping down ravenously

With how stretched his belly was with just the first prey, and with how pent up he was, Cookie came hard. His cock began spraying the stickier cum used to make another cocoon, this time using the whole bathroom as his nest. The parrot lady's legs were kicking in the air as she was sliding down to her inevitable end. The giant snow leopard aimed his horsecock all around to make sure it was spraying every square inch of the room to make it a suitable lair to evolve. The floor, his previous cocoon, the door, the sink, the toilet, the mirror, the walls, the ceiling, everything got covered in a thick layer of his spunk, as he kept on swallowing more of his meal.

Before he even finished swallowing the second prey, Cookie was done preparing the outer layer of his cocoon. His belly began working on assimilating the first meal, and providing some much needed fuel to his balls. After all, there was a large room to fill so he could grow even larger. His balls dropped lower and swelled even bigger yet again, growing large enough to reach down to the floor. And they began unleashing their contents. Cum splattered loudly against the top part of the evolution chamber, and soon a pool was forming. The seed level rose fast, inch after inch, as the huge leopard's horsecock hosed more cum all over the place.

Right as he was about to enter the orgasmic trance that allowed him to change, Cookie finished swallowing the bird lady's feet. By this point, the other victim in his stomach had been completely digested and the resulting energy had been transferred to his balls as fuel for his evolution. As soon as the second woman was fully in his stomach, it was immediately worked on. His belly got to the digestion process fast, increasing even more the already crazy output of cum out of the beast's cock.

Cookie had to get on his knees to keep growing and evolving. He was packing on more inches every second, his balls were swelling to become beanbag-chair-sized, and he was pumping his cock up and down to increase the stimulation. His body was convulsing from pleasure in rhythm with every long blast of cum that splattered against the ruined bathroom. As the jizz was being assimilated into his body, he kept on growing larger and thicker. And the more he grew, the hungrier he became. His head bumped into the top of the cocoon, and he was forced to lower himself once again. He got on all fours, bathing most of his body into the growth hormone that his cum had become.

The giant leopard kept on growing bigger and beefier. His legs were like tree trunks, packing enough power to support the tons of muscles that he had become. His cock kept on firing more and more fuel for his evolution, all while lengthening and fattening.

An hour of nurturing his growth later, Cookie felt ready to get out of his undersized lair. Though he would have loved to stay in to get bigger, he didn't have enough room to actually grow any more, so he pierced the thick outer layer of his evolution chamber. He pushed his head forward, crashing his immense head out of the bathroom door. Then, the tip of his equine shaft poked out right underneath. Then, his enormous shoulder burst through the walls of the house on both sides of the door, shaking the very foundations of the building. The gigantic cat crawled on all fours out of the destroyed bathroom, dragging his boulder-sized balls behind himself. Even by standing on all fours like that, his back was almost up to the ceiling of the house. If he had been able to stand up, he would have been close to two stories high. His cock was throbbing hard, gushing pre all over the room he had emerged in.

The titanic leopard smirked. He let out a deep bellow and brought a hand to work on his mighty horsecock. He still felt horny, and so incredibly hungry. He opened his mouth, and devoured a puny couch. And then, a table. It didn't matter that it wasn't food he was eating, he was too hungry to care and he knew his stomach would easily handle anything thrown into it.

An unsuspecting leopard couple in a car got into the driveway to their house, coming back with their children from a trip to the shopping mall. The husband pushed a button on a remote, opening the garage's door, and then pulled in. As soon as they all got out of the vehicle, a large creature burst inside by ramming through a wall.

The leopard looked down at the tasty snacks who were petrified in fear. He grabbed the husband, swallowed him whole, then ate the wife. The other leopards were panicking and trying to get away, but Cookie made sure to block their escape with his tail or his arms. One by one, he stuffed the members of his family down his gullet.

When his victims were all in his belly, the leopard closed the door of the garage and started creating his next evolution nest in there. The place was already a little cramped, but with how much he had just eaten, he would still be able to gain more size. While his cock was spraying cum to prepare his new lair, he munched down on the car that would be in the way of his growth, and ate everything else to leave the room bare.

And then, he came hard. In a matter of a dozen seconds, his latest cocoon was weaved and ready, and his cock unleashed torrents of cum fast. His belly felt full, but not full enough to fuel his growth efficiently. He wrapped his maw around his dick and began suckling, drinking easily half of the flow out of his enormous balls and spilling the other half down in his lair.

He grew taller, more muscular, more virile. The cocoon started feeling cramped fast. Due to the uninterrupted flow of cum he was firing in his own mouth, his stomach was never empty and so it was constantly digesting more fuel for his balls to fire more seed.

An hour later, rumbling could be heard in the city. A giant snow leopard burst out of a neighbourhood. He stood at 35 feet tall, with a cock that rose easily above his head and with balls that dragged heavily behind him, half as tall as he was himself. The titanic cat would have been mostly harmless if it hadn't been desperately hungry and horny. His giant shaft was constantly leaking globs of cum down onto the streets.

The giant walked down the city, munching into homes, scooping passersby and stuffing them down his mouth; he trampled around and squeezed himself inside a shopping mall warehouse, where he ate every piece of food he found and created another nest, completely unfazed by the cold.

And a few minutes later, a gigantic 200' long cock burst out of the building, followed by a titanic 300' leopard. The gargantuan cat dragged his balls around heavily; they were each as large as he was tall. Despite having undergone through the biggest growth spurt yet, he still felt hungry for a lot more. So, he began looking for another place to make another lair, but there weren't any suitable places in his direct vicinity.

And then, his eyes fell on to a volcano. And he smirked as a twisted idea went through his mind; perhaps there was after all a suitable place for him to become even greater.

Cookie took heavy steps towards his target, sending tremors throughout the city and leaving craters under his paws. His giant cock was unleashing amounts of pre that were enough to drown the unlucky people underneath him. The few that survived the flood were buried under the gigantic balls that were dragged behind the hungry leopard. Leaving nothing but flattened rubble drenched in a mixture of precum and excessively slimy cum behind him, the giant climbed the smoking mountain effortlessly. He dove head first in the volcano, disappearing inside it, causing some lava to overflow and start flowing down the mountain. Unhindered by the heat, Cookie swam in the lava, going deeper down.

Once satisfied with how far he had swam in the depth of the volcano, reaching the magma chamber, Cookie put his plan in motion. He opened his maw and began drinking the burning liquid, feeling the pleasant heat go down his gullet and into his belly. It was a tasteless feast that couldn't quench the leopard's insatiable hunger for more power. After devouring it all, the void left by the absence of magma was quickly filled by the titanic horsecock hosing cum everywhere. The whole chamber became an immense lair in which he grew to well over a mile long.

Still unsatisfied, the titanic snow leopard then headed to bigger places to grow. Piercing his way through the earth's crust, Cookie devoured everything in sight, eventually creating a cave inside the planet for him to make another cocoon. Except this time, he left a crack open in it while he orgasmed and grew, a crack that he used to drink an ocean to fuel his growth further.

Soon, the unstoppable god-like being had become large enough that the whole inside of the planet was becoming one gigantic cocoon for him to grow and evolve. He ate everything that was in the core of the planet and filled the emptiness with his seed.

And he absorbed his cum, and he grew. To a thousand miles large. His cock was growing bigger and bigger, and due to the size of his cocoon, he hadn't been able to create the full outer layer efficiently. Due to this, some of his cum began flowing out of the center of the planet.

What few oceans were left turned white.

Volcanoes erupted with cum.

The Earth's crust was pierced with a dick the size of the planet that blasted the moon away with jizz. All around the earth, rifts in the ground were opening and overflowing with cum. Tsunamis covered the world. And finally, the gigantic snow leopard burst out of his latest cocoon: the whole planet.

Before heading to his next target, Cookie grabbed the destroyed fragments of the Earth and tossed them in his mouth. His whole body was trembling in anticipation, his belly rumbling at the idea of its next feast, and his cock unleashing a new milky way into space. He headed for his next target: the sun.