Serum Snare
Serum Snare: Instant, Phyrexia: All Will Be One. Return target nonland permanent to its owner's hand. Printings, prices, and format legality on Mana Grove.
- Mana cost
- {1}{U}
- Mana value
- 2
- Type
- Instant
- Colour identity
- Blue (U)
- Rarity
- Uncommon
- Set
- Phyrexia: All Will Be One (ONE)
- Released
- 2023-02-10
- Collector number
- 68
- Artist
- Lauren K. Cannon
- Commander rank
- 4,483 (by how often it appears in Commander decks)
- Keywords
- Proliferate
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About Serum Snare
Serum Snare is a Magic: The Gathering card, an uncommon blue instant from Phyrexia: All Will Be One (ONE), an expansion set released in February 2023. It is collector number 68 in that set, with art by Lauren K. Cannon. It costs {1}{U} (one generic and one blue mana) to cast, for a mana value of 2. Its colour identity is blue. It is legal in Pioneer, Modern, Legacy, Vintage, Commander, Duel Commander, Oathbreaker, Brawl, Historic, Timeless and Gladiator. Phyrexia: All Will Be One is its only printing so far. The latest aggregated market price for this printing is $0.29 (normal finish, as of 2026-11-02).
Card text
Return target nonland permanent to its owner's hand. If that permanent had mana value 3 or less, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
"I bring a message from the Autonomous Furn-argh!"
Market price
Latest aggregated market price for the normal finish of this printing: $0.29 (as of 2026-11-02).
The figure covers this printing only; other printings carry their own price on their own page.
Format legality
Legality of Serum Snare by format. Formats in which it is not legal are not listed.
| Pioneer | Legal |
|---|---|
| Modern | Legal |
| Legacy | Legal |
| Vintage | Legal |
| Commander | Legal |
| Duel Commander | Legal |
| Oathbreaker | Legal |
| Brawl | Legal |
| Historic | Legal |
| Timeless | Legal |
| Gladiator | Legal |
Official rulings
Six official rulings apply to Serum Snare, newest first.
- 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.
- 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.
- 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.
- 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.
- An ability that triggers "Whenever you proliferate" triggers even if you chose no permanents or players while doing so.
Similar cards
Other instant cards with a blue colour identity, ranked by how often they appear in Commander decks.