The X-Men #86

This 1974 Marvel reprint-era issue sets the stage for mutant mayhem with a striking cover by Dan Adkins — the massive, immovable Blob squares off center-stage while the teleporting Vanisher looms in blue, and several X-Men including a red-haired figure and others crowd the stone-walled background. The bold cover copy declares humanity has never faced a more dreadful threat, teasing "The Sinister Shadow of...Doomsday!" with genuine dramatic flair. At twenty cents, this slice of Bronze Age Marvel delivers the team the cover itself cheerfully calls "The Weirdest Superhero Team of All Time!