Claim the Firstborn is a uncommon Sorcery card from Strixhaven Mystical Archive (STA), collector number 37. Current market price: $0.33 (foil $0.32), TCGplayer market prices via Scryfall.
Gain control of target creature with mana value 3 or less until end of turn. Untap that creature. It gains haste until end of turn.