Devouring Tendrils is a uncommon Sorcery card from Strixhaven: School of Mages (STX), collector number 126. Current market price: $0.11 (foil $0.23), TCGplayer market prices via Scryfall.
Target creature you control deals damage equal to its power to target creature or planeswalker you don't control. When the permanent you don't control dies this turn, you gain 2 life.