My Doppelgangers Conquer Infinite Worlds

Trapped as a freezing, helpless child in the brutal Demon Slayer world, Bai Ye faces certain death by beast or demon. Rescued by the kind Kamado family, he knows their tragic future: annihilation by Muzan Kibutsuji. Powerless, he despairs – until a miraculous secret awakens. A mysterious 'gray fog' space links him to countless other versions of himself across the multiverse! From a powerful Death God mastering spiritual arts to a genius scholar from a modern world, their combined knowledge, memories, and powers flow into him, transforming a weakling into a rapidly evolving prodigy. Now, with the fate of the Kamado family hanging by a thread, can this child rewrite destiny and confront the encroaching darkness before it consumes them all?