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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 Promos
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Autonomous Assembler (PBRO-34p prerelease stamp) is an Artifact Creature — Assembly-Worker rare from The Brothers' War Promos. It has Prototype {1}{W} allowing it to be cast as a 2/2 for that cost, and it has vigilance plus {1}, {T}: put a +1/+1 counter on target Assembly-Worker you control. The card supports incremental board growth by boosting other Assembly-Worker creatures and can be played either for its normal 5-mana 4/5 body or as the cheaper prototyped version for earlier tempo.
Catalog pricing data as of 28 Apr 2026, 18:38
