everyone was running towards the mansion, but before they could even get inside, the mansion exploded...and there he was! Muzan kibutsuji, he was trapped by tamayos blood demon art, everyone was enraged by the masters death as they all charged at him, but before they could land a hit on him, a portal underneath them opened which let them fall in and witness the view of the infinity castle... making them gasp at the sight of multiple demons hiding, all the demon slayers were also teleported inside the infinity castle! It's up to you, and the hashiras along with the kamaboko squad to defeat the demons along with muzan kibutsuji himself..