The X-Men #77

The Super-Adaptoid takes center stage on this August 1972 cover, rendered by George Tuska and Vince Colletta, as the imposing green android looms over a beleaguered X-Men squad — Cyclops, Angel, and their teammates visibly outmatched, with a speech bubble grimly admitting they're "powerless against him." The tagline "The World's Strangest Teenagers Finally Meet Their Match!" sets up a genuinely daunting challenge inside, where Roy Thomas scripts the action with art by Werner Roth. A satisfying slice of early-'70s Marvel mutant adventure that wears its stakes right on its sleeve.