The Anti-Kibutsuji drug was pivotal in defeating Muzan by converting him into a human, rapidly aging him, and breaking him down at a cellular level. The drug weakened Muzan substantially ...

The Ubuyashiki family curse stems from their bloodline connection to the first demon, Muzan Kibutsuji. Members suffer from a deadly disease, causing males to have short lives with skin resembling ...

As the Demon Slayer Corps members and Hashira engaged in a group strength training program, the Hashira Training, in preparation for the forthcoming battle against the demons, Muzan Kibutsuji ...