Aether Wildfire [EVR123] 1st Edition Extended Art Rainbow Foil MTG Card - Premium Collectible for Magic: The Gathering Players & Deck Builders

Deal 4 arcane damage to target opposing hero.If Aether Wildfire is played during an opponents turn, until end of turn, action card effects that deal arcane damage instead deal that much arcane damage plus X, where X is the damage dealt by Aether Wildfire."