Sulfuric Vortex is a rare Enchantment card from Duel Decks: Sorin vs. Tibalt (DDK), collector number 68. Current market price: $0.86, TCGplayer market prices via Scryfall.
At the beginning of each player's upkeep, this enchantment deals 2 damage to that player. If a player would gain life, that player gains no life instead.