Superman #177

From 1965 comes this wonderfully strange Superman adventure, with a cover by Curt Swan and George Klein that promises something genuinely unsettling: the Man of Steel straining with every muscle against a churning, tornado-like entity called "IT," described as "weirder than The Thing! Mightier than Godzilla!" Alongside him, two police officers and a civilian haul desperately on chains, their expressions etched with exhaustion and fear as the spiraling purple vortex threatens to consume Superman's already-trapped hand. It's a cover that captures Silver Age DC at its most imaginatively outlandish — teasing a menace so bizarre it barely has a name.