Referee Squad [March of the Machine]

Set: March of the Machine Type: Creature — Homunculus Rarity: Uncommon Cost: {2}{U} Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)VigilanceWhen Referee Squad enters the battlefield, tap target creature an opponent controls and put a stun counter on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)