Pontiff of Blight is a rare Creature — Zombie Cleric card from RNA Guild Kit (GK2), collector number 33. Current market price: $0.34, 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.) Other creatures you control have extort. (If a creature has multiple instances of extort, each triggers separately.)