Worlds Within Worlds is a rare Sorcery card from Marvel Super Heroes (MSH), collector number 241. Current market price: $0.13 (foil $0.23), TCGplayer market prices via Scryfall.
Exile all creatures. Each player may put any number of creature cards from their hand onto the battlefield. Then put all cards exiled this way into their owners' hands. Exile Worlds Within Worlds.