After gaining the power of the Infinity Stones, Gamora sealed the souls of the universe within the Soul Gem. In order to incapacitate its inhabitants, she additionally folded the universe in half, merging every soul with another.
This course of action accidentally resulted in the creation of Warp World, a pocket dimension where history was rewritten and adapted to the fused beings. Inside Warp World, Iron Man and Thor were merged together into Iron Hammer.
-- Marvel Fandom
Key Issues & Appearances
1
Significant comic book appearances featuring Iron Hammer
