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Prototype {1}{W} — 2/2 (You may cast this spell with different mana cost, color, and size. It keeps its abilities and types.) Vigilance {1}, {T}: Put a +1/+1 counter on target Assembly-Worker you control.
Abilities, attacks, weakness & resistance
Other cards from The Brothers' War
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Autonomous Assembler (BRO-309) is an Artifact Creature — Assembly-Worker from The Brothers' War set printed as a rare. It has Prototype {1}{W} allowing it to be cast as a 2/2 for that cost, and normally is a 5/5 with vigilance and an activated ability costing {1} and tapping to put a +1/+1 counter on a target Assembly-Worker you control. Its activated ability supports Assembly-Worker synergies and counter-based strategies in decks that can include white artifacts.
Catalog pricing data as of 18 Apr 2026, 23:14
