Aun'va, Ethereal Supreme

+1: Exile top card of your library. You may cast that card. If you don't, Aun'va, Ethereal Supreme deals two damage to each opponent.
-3: Aun'va, Ethereal Supreme deals four damage to target creature.
-7: You get an emblem with "Whenever you cast a spell, this emblem deals five damage to any target"