History
After a lab accident, Mark Raxton became the Molten Man and over the years he had many battles against New York's superheroes, often solo, but sometimes as a pawn of other supervillains. Though reportedly reformed at some point, he returned to a life of crime and was imprisoned. Being under control of the nanites, he was used by S.H.I.E.L.D. during Civil War and was one of the villains used to attack the heroes that were attacking Prison 42.[1]