After Cosmo returned to human form, his desire to grow stronger led Mobius to devise a tailor-made plan for him: devour Honkai Beasts to grow.
Since Vishnu was a peculiar Honkai Beast capable of growing stronger by devouring other Honkai Beasts, Cosmo began his gluttonous journey.
After the battle against the Ninth Herrscher, the Herrscher of Rock, Kevin felt that he had been too weak to eliminate the Herrscher of Rock immediately, resulting in Hen's sacrifice.
So he applied to Dr. MEI and Mobius for the Chimera Experiment Mobius had proposed before.
After spending a week persuading Dr. MEI, Kevin was injected with Vishnu's Hypervariable Factor in Mobius's laboratory. Since Vishnu possessed the ability to grow stronger through devouring, it would allow Kevin's body to endure the experiments that followed.
After Vishnu's genes fused with Kevin's body, pale blue patterns emerged across him. Then came the genes of other Honkai Beasts—dozens of different Honkai Beast genes were carefully injected into Kevin's body by Mobius, causing him to begin mutating.
In the end, Kevin took on a demonic form. Huge wings grew from his back, a pair of demon-like horns sprouted from his head, and his upper body was wrapped in strange bandage-like tissue covered in hard scales.
Demon God Kevin
Having assumed such a form, Kevin naturally gained even greater power. His ice-based abilities became stronger and mutated into even more terrifying black ice crystals.
At the same time, he could unleash attacks of multiple elements: lightning strikes, flames, freezing, poison—he had it all.
But his current appearance also made many people fear him. Some even called him a demon. After all, Westerners bought into that sort of thing, and some people with ulterior motives spread claims that Kevin was a demon who had come to destroy the world.
Progress