Radioactive Man (Yost Universe)

Dr. Chen Lu was a scientist from China who was exposed to raditation, altering his body and granting him superpowers. Chen was one of the supervillains who escaped during the supervillain breakout that led to the formation of the Avengers. Sometime later, Chen is seen trying to drain energy from one of Stark Industry's Arc Reactor. The combined efforts of Iron Man and Thor were enough to finally defeat Chen. Radioactive Man was one of the prisoners killed when Annihilus and his minions attacked Prison 42.