Warlock and the Infinity Watch #5 (1992)

Old Foes
Realizing that the rest of the Infinity Watch have been subdued, Warlock telepathically consults the hidden guardian of the Reality Gem to learn the whereabouts of the other Gem guardians. Learning that they are captives of the being called The Omega, held in a starship secretly orbiting Earth, Warlock charges to the rescue even though he is still unsure of his ability since returning to a mortal existence. But in a clash with one of the Omega's servants, he begins to realize that he's fighting someone he's battled before. And if his suspicions are correct, then he knows that he is battling one of his oldest foes.
Release Date: 1992