During the Heian era, Muzan was turned into a demon because of an experimental treatment for his illness gone wrong. Ever since he realized he possessed eternal life, his goal was to remain truly ...

Yoriichi himself has shown that he can single-handedly kill Muzan in an encounter between the two. The only reason the latter survived is that he split himself into thousands of tiny pieces to escape.

the Demon King Muzan is defeated, and Nezuko’s humanity is restored. Demons are purged from the world, the Tanjiro and the rest of the Demon Slayer Corps are free to hang up their swords and ...