Impossible Man (Fantastic Four: World's Greatest Heroes)

A strange being from an unknown dimension, The Impossible Man is able to morph himself into any substance and can recreate the environment around him into whatever amuses him. Often child like and extremely irritating to be around, The Fantastic Four were forced to amuse him until they could figure out a way to get him to leave their planet without wrecking it. They eventually realised the only way to get him to leave was by his own choice and promptly proceeded to bore him and he made his exit by his own accord.