Anime Crossover: The Perfect Lifeform, Starting with Demon Slayer

[Anime Crossover Fanfiction] + [Multiple Heroines] + [Evolution of Life] + [Author's Original Setting]

Bai Yu, bedridden for years, transmigrates into Demon Slayer. With a healthy body, he begins evolving toward perfection.

He devours and evolves in Demon Slayer, becoming the Ultimate Lifeform.

He collects souls in Akame ga Kill! and awakens a Stand.

In Type-Moon, he awakens magnetic field powers and blasts the entire TM world to smithereens!!!

At last, he fulfills his long-held wish to complete his evolution in the Garden Box, overcoming humanity's ultimate trial.