First printed in Mirrodin Besieged (2011)
All 6 prints
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March of the Machine Commander (MOC) #386, 2023
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Commander 2018 (C18) #226, 2018
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Duel Decks: Elves vs. Inventors (DDU) #63, 2018
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Magic Online Promos (PRM) #39638, 2011 (digital)
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Mirrodin Besieged (MBS) #140, 2011
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Mirrodin Besieged Promos (PMBS) #140★, 2011
Thopter Assembly 
Artifact Creature — Thopter
Flying
At the beginning of your upkeep, if you control no Thopters other than this creature, return this creature to its owner's hand and create five 1/1 colorless Thopter artifact creature tokens with flying.
MTGO price: 0.006 TIX, the cheapest non-foil print (average sell price on GoatBots, 28 Oct 2026).
Combos
3 combos from Commander Spellbook, the most popular first.
- Infinite turns, Lock: Thopter Assembly + Time Sieve
- Infinite turns, Lock: Gonti's Aether Heart + Krark-Clan Ironworks + Prototype Portal + Thopter Assembly
- Infinite turns, Lock: Ashnod's Altar + Gonti's Aether Heart + Prototype Portal + Thopter Assembly
Legality
Constructed
- Standard Not legal
- Pioneer Not legal
- Modern Legal
- Legacy Legal
- Vintage Legal
- Pauper Not legal
- Future Standard Not legal
- Historic Not legal
- Timeless Not legal
- Alchemy Not legal
- Penny Dreadful Legal
- Premodern Not legal
- Old School 93/94 Not legal
Singleton
- Gladiator Not legal
Commander formats
- Commander Legal
- Duel Commander Legal
- Pauper Commander Not legal
- PreDH Legal
- Tiny Leaders Not legal
- Oathbreaker Legal
- Brawl Not legal
- Standard Brawl Not legal
- Competitive Brawl Not legal