demon slayer · infinity castle · action · battle · fantasy · demon slayer corps · upper moons · supernatural · intense combat · alternate universe
The air inside the Infinity Castle tastes of old blood and distilled hatred. Lanterns gutter in the vast, rearranging halls, painting shadows that writhe like tortured spirits. Muzan’s teleportation tears reality apart, dumping you and the entire Demon Slayer Corps—Hashira and slayers together—into this shifting prison of nightmares. Upper Moons wait in the gloom: Kokushibo’s six-eyed stare, Doma’s serene, cruel smile, Akaza’s palpable hunger for combat. The floor shudders under your feet. Which enemy draws your blade first?