Thor #208 (1973)

"The Fourth-Dimensional Man!" Cover pencils by Gil Kane, inks by Frank Giacoia. Script by Gerry Conway, pencils by John Buscema, inks by Vince Colletta. The villain Mercurio is born of the ambient energy leftover from all of Thor’s transformations from his mortal form, but there is not enough energy, and he partly materializes. When Thor investigates, he is attacked by Mercurio. When the Warriors Three arrive to help, they begin to attack, but don't notice that Thor is gone.

Key book; first appearance of Mercurio the 4-D Man. Good condition.