First printed in War of the Spark (2019)
All 13 prints
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Edge of Eternities Commander (EOC) #163, 2025
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Secret Lair Drop (SLD) #1751, 2024
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Ravnica Remastered (RVR) #464, 2024
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The Lost Caverns of Ixalan Commander (LCC) #339, 2023
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Commander Masters (CMM) #1007, 2023
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March of the Machine Commander (MOC) #409, 2023
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Phyrexia: All Will Be One Commander (ONC) #156, 2023
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New Capenna Commander (NCC) #410, 2022
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Magic Online Promos (PRM) #72223, 2019 (digital)
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War of the Spark Promos (PWAR) #248, 2019
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War of the Spark Promos (PWAR) #248p, 2019
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War of the Spark Promos (PWAR) #248s, 2019
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War of the Spark (WAR) #248, 2019
Land
: Add 
.
, : Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
"I can't protect everyone here. But those I can, I will."
—Karn
- Illustrated by
- Adam Paquette
Legality
- Legal in
- Pioneer, Modern, Legacy, Vintage, Historic, Timeless, Penny Dreadful, Gladiator, Commander, Duel Commander, Tiny Leaders, Oathbreaker, Brawl, Competitive Brawl
- Not legal in
- Standard, Pauper, Future Standard, Alchemy, Premodern, Old School 93/94, Pauper Commander, PreDH, Standard Brawl
Rulings (6)
- To proliferate, you can choose any permanent that has a counter, including ones controlled by opponents. You can choose any player who has a counter, including opponents. You can't choose cards in any zone other than the battlefield, even if they have counters on them.
- If a permanent ever has both +1/+1 counters and -1/-1 counters on it at the same time, they're removed in pairs as a state-based action so that the permanent has only one of those kinds of counters on it.
- Players can respond to a spell or ability whose effect includes proliferating. Once that spell or ability starts to resolve, however, and its controller chooses which permanents and players will get new counters, it's too late for anyone to respond.
- An ability that triggers "Whenever you proliferate" triggers even if you chose no permanents or players while doing so.
- If a player or permanent has more than one kind of counter on it, and you choose for it to get additional counters, it must get one of each kind of counter it already has. You can't have it get just one kind of counter it already has and not the others.
- You don't have to choose every permanent or player that has a counter, only the ones you want to add another counter to. Since "any number" includes zero, you don't have to choose any permanents at all, and you don't have to choose any players at all.
Prices
MTGO price: 0.006 TIX, the cheapest non-foil print (average sell price on GoatBots, 30 Oct 2026).
Combos
51 combos, the most popular first:
- Infinite turns, Lock: Karn's Bastion + Magosi, the Waterveil + Nesting Grounds
- Infinite turns, Lock: Karn's Bastion + Lithoform Engine + Magistrate's Scepter + Tekuthal, Inquiry Dominus
- Infinite turns, Lock: Karn's Bastion + Kurkesh, Onakke Ancient + Magistrate's Scepter
- Infinite turns, Lock: Doubling Season + Karn's Bastion + Lithoform Engine + Magistrate's Scepter
- Infinite turns, Lock: Karn's Bastion + Lithoform Engine + Magistrate's Scepter + Vorinclex, Monstrous Raider
- Infinite proliferate: Cryptic Trilobite + Hardened Scales + Karn's Bastion + Lost Jitte
- Infinite proliferate: Cryptic Trilobite + Crystalline Crawler + Gemstone Array + Karn's Bastion + Lost Jitte
- Infinite proliferate: Cryptic Trilobite + Kami of Whispered Hopes + Karn's Bastion + Lost Jitte
- Infinite proliferate: Cryptic Trilobite + Karn's Bastion + Lost Jitte + Ozolith, the Shattered Spire
- Infinite proliferate: Cryptic Trilobite + Karn's Bastion + Lae'zel, Vlaakith's Champion + Lost Jitte
