Spinal Embrace is a rare Instant card from Invasion (INV), collector number 276. Current market price: $0.37 (foil $6.11), TCGplayer market prices via Scryfall.
Cast this spell only during combat. Untap target creature you don't control and gain control of it. It gains haste until end of turn. At the beginning of the next end step, sacrifice it. If you do, you gain life equal to its toughness.