Crypt Ghast is a rare Creature — Spirit card from Ravnica Remastered (RVR), collector number 70. Current market price: $17.29 (foil $20.00), TCGplayer market prices via Scryfall.
Extort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.) Whenever you tap a Swamp for mana, add an additional {B}.