Autonomous Assembler (Promo Pack) [The Brothers' War Promos]

Set: The Brothers' War Promos Type: Artifact Creature — Artifact Creature — Assembly-Worker Rarity: Rare Cost: {5} Prototype (You may cast this spell with different mana cost, color, and size. It keeps its abilities and types.) 1W | 2/2Vigilance1, T: Put a +1/+1 counter on target Assembly-Worker you control.