First printed in Hour of Devastation (2017)
All 4 prints
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Commander 2021 (C21) #130, 2021
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Commander 2020 (C20) #124, 2020
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Hour of Devastation (HOU) #50, 2017
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Hour of Devastation Promos (PHOU) #50s, 2017
Swarm Intelligence 
Enchantment
Whenever you cast an instant or sorcery spell, you may copy that spell. You may choose new targets for the copy.
MTGO price: 0.006 TIX, the cheapest non-foil print (average sell price on GoatBots, 28 Oct 2026).
In the last 30 days 0.0% of Commander decks played it (1 of 6150). Most played in Yue, the Moon Spirit.
Combos
76 combos from Commander Spellbook, the most popular first.
- Infinite draw triggers, Infinite looting…: Frantic Search + Narset's Reversal + Swarm Intelligence
- Infinite artifact ETB, Infinite artifact LTB…: Narset's Reversal + Storm-Kiln Artist + Swarm Intelligence
- Infinite magecraft triggers: Reiterate + Swarm Intelligence
- Infinite artifact ETB, Infinite artifact LTB…: Brass's Bounty + Narset's Reversal + Swarm Intelligence
- Infinite artifact ETB, Infinite artifact LTB…: Storm-Kiln Artist + Swarm Intelligence + Unsubstantiate
- Infinite magecraft triggers, Infinite mana nonland permanents you control can produce…: Dramatic Reversal + Errant, Street Artist + Swarm Intelligence
- Cast all instants and sorceries with mana value 4 or less from your hand and graveyard, Infinite magecraft triggers…: Invoke Calamity + Narset's Reversal + Swarm Intelligence
- Infinite magecraft triggers, Infinite storm count: Spelljack + Swarm Intelligence
- Infinite card draw, Infinite draw triggers…: Reprieve + Storm-Kiln Artist + Swarm Intelligence
- Infinite turns, Lock: Call to Mind + Mystic Retrieval + Swarm Intelligence + Time Warp
Legality
Constructed
- Standard Not legal
- Pioneer 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 Not legal
- Tiny Leaders Not legal
- Oathbreaker Legal
- Brawl Not legal
- Standard Brawl Not legal
- Competitive Brawl Not legal