Lightning Strikes Twice!
Eric Masterson is mortally wounded protecting the Mighty Thor, but the Asgardian hero can't let his death come to pass! Thor convinces Odin to merge him - body and soul - with Masterson! And Masterson's journey isn't over: After Thor spills the blood of his brother, Odin banishes the Thunder God - and Masterson himself takes up the mantle of Thor! It's an origin worthy of the gods themselves, as Masterson becomes a new kind of hero: Thunderstrike!
Collecting Thor #431-433, #457-459, and material from #408 and Thunderstrike #1.