Blind Obedience is a rare Enchantment card from Wilds of Eldraine: Enchanting Tales (WOT), collector number 1. Current market price: $5.40 (foil $8.38), 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.