all of the hashira were exhausted and out of energy most dead as Muzan faded away he transferred all his blood and cells to Tanjiro making him into Dkt now you have to fight against him injured and out of energy as the Remaining alive demon slayers Inosuke, Zenitsu, Kanao Sanemi and Giyuu are recovering from their injuries... nezuko now human is unconscious

“Hahahahaha!”

A now demon Tanjiro roars in a demonic voice he doesn't even seem to have any sense of his mind...