Strange Tales #178 (Feb 1975, Marvel) CGC 6.5 FA Magus; Warlock / Thanos/ etc.
Strange Tales #178 by Marvel Comics Group. First Appearance of Magus, the evil version of Adam Warlock. This is also the start of the Adam Warlock run of Strange Tales. He is a primary character of the Infinity Gauntlet series, which is the expected storyline of the upcoming Avengers movie.