Muzan's final form, moments before he died, resembled a human baby. He grew in size and turned into a toddler-like entity, which, as a form, didn't make sense to the readers.

Muzan's final form made him physically powerful but also showcased his hopelessness. Despite his immense power, Muzan's final weakness was exploited by the Demon Slayer Corps. Demon Slayer Corps ...

And by the time Muzan realizes that he’s begun to slow down, and figure out the root of the problem, it’s already too late. He’s aged 9000 years since the battle began.

Muzan's Secret. In addition to the new powerful forms of Nezuko and Daki, the latest episode of "Demon Slayer" Season 2 also dropped a major bombshell about the main antagonist of the series ...

Muzan continues to move his vital organs as Tanjiro continues to master the multiple forms of the Hinokami Kagura, and somehow Tanjiro has to stand against Muzan alone for 59 more minutes.