Tendrils of Agony is a uncommon Sorcery card from Scourge (SCG), collector number 75. Current market price: $1.72 (foil $43.10), 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.)