Aquaman #24

Three villains at once — that's the kind of odds Aquaman faces on Nick Cardy's vivid cover for this December 1965 issue. The Sea King is caught in a chaotic three-way assault: the purple-clad Fisherman looms above wielding his line, the flame-haired Karla unleashes a blazing energy burst that rocks Aquaman center-cover, and a green-suited figure identified as the Invisible Un-Thing joins the fray from above. Cardy's dynamic composition and bold colors make the threat feel genuinely overwhelming, a perfect invitation to crack open "Aquaman, Save Our Seas.