I Swallowed the Zerg Overmind's Egg

In a wasteland arena, F-rank Ryker fights to save his sister Lena from a genetic disease. Desperate, he swallows a Zerg Overmind's egg—and awakens terrifying power. He rises, but slowly transforms into something inhuman. He uncovers a conspiracy: his parents' deaths and Lena's illness are part of an empire's fusion experiments. As war and swarm engulf the city, can Ryker keep his sanity and save his sister?