Adventure Comics #373

High above a gleaming futuristic cityscape, a pair of purple-clad twins — a blonde young man and a blonde young woman — are shown dominating the action as they physically overwhelm Superboy, Supergirl, and several other Legionnaires in mid-air combat. The cover, penciled and inked by Neal Adams, crackles with kinetic energy as the twins boast they're "not in our class" while the Legion scrambles to respond. Adventure Comics #373 teases readers with a delightful mystery — "Can you spot the clever comic clues? Who are… the Tornado Twins?" — making this October 1968 issue a genuinely fun puzzle wrapped in a superhero showdown.