Rite of Consumption is a common Sorcery card from Shadowmoor (SHM), collector number 76. Current market price: $5.52 (foil $28.83), TCGplayer market prices via Scryfall.
As an additional cost to cast this spell, sacrifice a creature. Rite of Consumption deals damage equal to the sacrificed creature's power to target player or planeswalker. You gain life equal to the damage dealt this way.