How Muzan Dies in Demon Slayer: Full Battle, Powers, Deaths, and Ending Faq
Before his consciousness fully dissolves into nothingness, Muzan attempts one final, horrifying gamble. Realizing his physical vessel is ruined, he injects his remaining blood, cellular memory, and power into the dying Tanjiro Kamado. Muzan's objective is perverse: Tanjiro has conquered Sun Breathing and shares blood ties with Nezuko Kamado, who conquered sunlight itself. Muzan aims to create an invincible "Demon King Tanjiro" who can walk under the sun forever.
Tanjiro briefly transforms into a feral demon, immune to daylight and incapable of being restrained by ordinary means. The transformation threatens to undo everything the Corps fought to achieve. The crisis resolves only because Kanao Tsuyuri dashes through Tanjiro's attacks, using her remaining functional eye to administer a final dose of Tamayo's humanizing medicine. Inside his psychological landscape, Tanjiro rejects Muzan's desperate pleas to inherit his dark legacy, breaking free of the mental grip and returning to humanity.