Baffling End is a uncommon Enchantment card from Rivals of Ixalan (RIX), collector number 1. Current market price: $0.27 (foil $0.52), TCGplayer market prices via Scryfall.
When this enchantment enters, exile target creature an opponent controls with mana value 3 or less. When this enchantment leaves the battlefield, target opponent creates a 3/3 green Dinosaur creature token with trample.