Mysterio, Master of Illusion is a rare Legendary Creature — Human Villain card from Marvel's Spider-Man (SPM), collector number 37. Current market price: $0.36 (foil $0.43), TCGplayer market prices via Scryfall.
When Mysterio enters, create a 3/3 blue Illusion Villain creature token for each nontoken Villain you control. Exile those tokens when Mysterio leaves the battlefield.