Doomspawn: I Evolve to Ultimate Therianthrope

In the wake of the apocalyptic Red Mist, Caleb Hunt's world is reduced to two truths: his family is dead, and his sister is missing. His quest for vengeance and answers leads him to the front lines of humanity’s final stand. But Caleb is a living weapon, harboring a power born of the same source as the invading horrors. To fight them, he must become like them—devouring beasts to steal their abilities, evolving into a stronger, more monstrous version of himself with every battle. This is his sacrifice. Every step toward salvation is a step into the abyss. In a world where evolution is the only law, Caleb must choose: cling to his fading humanity, or embrace the beast within to become the strongest survivor of the end times.

(Source: WebComics)