Blind Obedience is a rare Enchantment card from Ravnica Remastered (RVR), collector number 303. Current market price: $4.83 (foil $5.94), 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.) Artifacts and creatures your opponents control enter tapped.