The X-Men #74

From the February 1972 cover by Gil Kane and Frank Giacoia, the X-Men — Cyclops, Marvel Girl, Iceman, Beast, and Angel — charge into fierce combat against a towering, Egyptian-styled armored villain whose amulet deflects Cyclops's optic blast right back at him, with the defiant boast "I'll kill you all!" crackling across the scene. The dramatic cover tagline "Cry Holocaust!" makes it clear this issue wastes no time throwing Marvel's mutant team into serious danger. Roy Thomas and Werner Roth bring their signature energy to this mid-run chapter, making it a satisfying slice of early-'70s X-Men action.