Action Comics #324

This May 1965 DC issue features a wonderfully unsettling cover by Curt Swan and George Klein, spotlighting a devilish Supergirl stirring a bubbling cauldron while a blinded, staggering Superman clutches at a skeletal magical force gripping his eyes. The cover story is "The Black Magic of Supergirl!" — and with the Maid of Might sporting devil horns and gleefully gloating that her sorcerer's spell has left even Superman helpless, it's a genuinely striking premise for Silver Age fans. Interior art comes from the reliable Jim Mooney, whose clean storytelling brought many memorable Supergirl adventures to life throughout this era.