Unstable Amulet (Modern Horizons 3 514) - Uncommon Magic: The Gathering Card

When Unstable Amulet enters the battlefield, you get (two energy counters).Whenever you cast a spell from anywhere other than your hand, Unstable Amulet deals 1 damage to each opponent., Pay : Exile the top card of your library. You may play it until you exile another card with Unstable Amulet.