Zaffai and the Tempests is a rare Legendary Creature — Human Bard Sorcerer card from Secrets of Strixhaven (SOS), collector number 360. Current market price: $0.34 (foil $0.74), TCGplayer market prices via Scryfall.
Once during each of your turns, you may cast an instant or sorcery spell from your hand without paying its mana cost.