Legends of Mundus Ch 8-9
Ch.8: The Dark Siege Uprising.
The Nulok wanted to annihilate the Humans and Unikrons. But the only thing of that they found was a single hammer left behind by the Titans. They tried to withdraw its power, however the power from the hammer mixed with the angry power of Solano became a dark, deadly, horrid Power which is now called Dark Magic. This magic was deadly yet the Nulok was able to control it without a problem, with this new power along with their leader Nag'Nel they now set their sights on revenge. Over time they learned how to summoning demonic like entities to fight for them and created a demonic army under their control and now they prepare for the retaliation.
Ch.9: The Rise of Arcadius.
After pushing back the Nulok threat Alphrnon was treated a hero to his people. Alphrnon knowing that the Nulok will eventually come back he along with the Rebellion planned to gather the other humans and fled up north were they stumbled upon the remains of a abandoned castle ruins left behind by the Titans. The Humans took refuge behind its colossal walls, setting up defenses and training warriors and mages for battle, along with the Unikrons for support teaching the arts of Magic as well. This also the time when a nearby race called the Lotori came to them, they where in need of help from the Nulok who had attacked there village, the Humans took them in this was proven to be an asset for the Humans. The Lotori were known for their stealth which is why they manage to avoid the Nulok for this long, they were also skilled archers because they preferred far ranged combat. Alphrnon also made a flag representing the freedom for all of Humanity and the alliance with the Unikrons and the Lotori, as he calls this new fortress Arcadius.