Aetherstream Leopard [Aether Revolt]

Set: Aether Revolt Type: Creature — Cat Rarity: Common Cost: {2}{G} TrampleWhen Aetherstream Leopard enters the battlefield, you get {E} (an energy counter).Whenever Aetherstream Leopard attacks, you may pay {E}. If you do, it gets +2/+0 until end of turn.