Tendrils of Agony is a rare Sorcery card from Strixhaven Mystical Archive (STA), collector number 34. Current market price: $0.43 (foil $2.04), TCGplayer market prices via Scryfall.
Target player loses 2 life and you gain 2 life. Storm (When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies.)