Demon Slayer: Multiversal Arsenal vs. Muzan

When Wang An awakens as Fujiko Kyo in the Demon Slayer world, he brings more than memories—he brings the Dimensional Arms System. Iron Man's Mark 85 armor against Akaza's martial arts. Star Wars lightsabers slicing through Kokushibo's moon blades. The Infinity Gauntlet's snap teaching Muzan the meaning of true despair. Armed with weapons from every universe imaginable, he's rewriting every tragedy, saving every lost soul, and turning the demon-hunting world upside down. No more deaths. No more broken promises. Just one overpowered transmigrator with infinite divine weapons and a mission to fix…