Absorbing Man

Carl "Crusher" Creel, AKA Absorbing Man is a villain who can turn into any material he touches.

The Avengers: Earth's Mightiest Heroes
Bruce Banner seeks Creel to find information about the Cube, the prison for Gamma irradiated villains. However, Creel absorbs the metal of a spoon and attacks Banner to provoke him to turn into Hulk and fight him. Creel is defeated and sent to the Cube.

During the breakout, Absorbing Man and Abomination helped the Leader to take the Cube.

When the Leader activated his Gamma dome in Las Vegas, Absorbing Man absorbed Mjolnir to fight Thor, but this resulted on his undoing as Thor concentrated to control him just like he controls Mjolnir, so he sent Absorbing Man crashing into the Leader.

Absorbing Man was sent to Prison 42, and was one of the prisoners who helped the Avengers when Annihilus invaded the prison.

Hulk and the Agents of S.M.A.S.H.
Absorbing Man, Titania and the Wrecking Crew escape the Cube and face Hulk's team.