Marvel: Omniversal Clones ( Tensura )

A man died from our universe and had his soul splintered across multiple realities, with each fragment of soul containing a consciousness of its own.
one such soul fragment ends up in Marvel Universe 1 million years before the modern. He communicates with fragments of his soul across realities with the help of the artifact that caused his demise and share their memories of technology,combat,superpowers to grow in their respective worlds.

Confirmed worlds
1. Marvel
2.Dc
3.Tensura

(Probable worlds)
Lord of mysteries
DxD
Solo Leveling
etc