Issue: #41
Last valuation update: 2026-10-14
The X-Men fight against the Grotesk, the last survivor of a race (the Sub-Humans) that once had lived in the interior of Earth.2nd story: Jack O'Diamonds wants Scott Summers to help him with his evil plan and to fight against Professor Xavier. Jack O'Diamonds successfully turns himself into a Living Diamond.
First appearances: King Krono, Ingar, Grotesk
Creators: Stan Lee, Roy Thomas, George Tuska, Sam Rosen, Don Heck, John Verpoorten, Werner Roth
Characters: Angel, Beast, Cyclops, Iceman, Jean Grey, Professor X, Morph, Zelda Kurtzberg, King Krono, Ingar, Grotesk, Jack O'Diamonds, Vera Cantor