Aether Revolt is a rare Enchantment card from Modern Horizons 3 (MH3), collector number 113. Current market price: $0.23 (foil $0.35), TCGplayer market prices via Scryfall.
Revolt — As long as a permanent left the battlefield under your control this turn, if a source you control would deal noncombat damage to an opponent or a permanent an opponent controls, it deals that much damage plus 2 instead. Whenever you get one or more {E}, this enchantment deals that much damage to any target.