Aether Herder [Aether Revolt]

Set: Aether Revolt Type: Creature — Elf Artificer Druid Rarity: Common Cost: {3}{G} When Aether Herder enters the battlefield, you get {E}{E} (two energy counters).Whenever Aether Herder attacks, you may pay {E}{E}. If you do, create a 1/1 colorless Servo artifact creature token.