Power Taint is a common Enchantment — Aura card from Urza's Saga (USG), collector number 90. Current market price: $0.21, TCGplayer market prices via Scryfall.
Enchant enchantment At the beginning of the upkeep of enchanted enchantment's controller, that player loses 2 life unless they pay {2}. Cycling {2} ({2}, Discard this card: Draw a card.)