Core Prowler
MBSMirrodin Besieged/#103/2011Uncommon
MV 4
Current paper retail
TCGplayer$0.82
ManaPool$0.30
Cardmarket€0.71
Card Kingdom$1.49
Buylist (dealers pay)
Card Kingdom$0.38
MTGO (Cardhoarder)
retail$0.03 tix
Paper retail history (USD)
3 providers
Latest $1.49High $1.49Low $0.59▲ 152.5%
Market and collecting
Market overview
$0.82TCGplayer, USD, retail, nonfoil
Latest observation: 2026-11-10
7d▲ 3.8%30d▲ 2.5%90d▲ 15.5%
90d high
$0.91
90d low
$0.44
Paper printings priced
1
Currently 1st
Cheapest paper printing
$0.82
Mirrodin Besieged
- Up 2.5% over the last 30 days on TCGplayer.
- Currently 10% below its 90 day high of $0.91.
- Foil copies of this printing carry a 521% premium over nonfoil.
Find this printing on eBayView on TCGplayerAffiliate. MTGPrices may earn from qualifying eBay and TCGplayer purchases.
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Compare printings (1 priced)
Gameplay and rules
Artifact Creature — Phyrexian Horror
Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)
When this creature dies, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
2 / 2
Keywords
ProliferateInfect
Card capabilities
ArtifactCreature
Derived deterministically from card types, Oracle text and keywords. Not a strategic evaluation.
Format legality
Primary formats
Eternal formats
Digital formats
Rulings (6)
wotc4 Feb 2023
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.
wotc4 Feb 2023
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.
wotc4 Feb 2023
An ability that triggers "Whenever you proliferate" triggers even if you chose no permanents or players while doing so.
wotc4 Feb 2023
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.
wotc4 Feb 2023
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.
wotc4 Feb 2023
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.
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About this card
Core Prowler
Core Prowler is an Artifact Creature — Phyrexian Horror, with mana cost {4} (mana value 4).
Format legality: Commander: legal, Modern: legal, Standard: not_legal, Pioneer: not_legal, Legacy: legal, Pauper: not_legal.
Current headline price on TCGplayer: $0.82 (up 2.5% over 30 days).
Frequently asked
Core Prowler FAQ
How much is Core Prowler worth?
The current TCGplayer USD retail price for Core Prowler is $0.82. It is up 2.5% over the last 30 days. Over 90 days it has ranged from $0.44 to $0.91.
What is the cheapest printing of Core Prowler?
The cheapest currently priced paper printing is from Mirrodin Besieged at $0.82 on TCGplayer.
What set was Core Prowler first printed in?
The earliest English paper printing that MTGPrices tracks is from MBS #103, released 2011-02-04.
Is there a foil version of Core Prowler?
Yes. On this printing, foil copies trade at $5.09 versus $0.82 for nonfoil, which is 521% more expensive on TCGplayer.
Is Core Prowler legal in Commander?
Yes, Core Prowler is currently legal in Commander per Scryfall's legality feed.
Is Core Prowler legal in Modern?
Yes, Core Prowler is currently legal in Modern per Scryfall's legality feed.
Is Core Prowler legal in Standard?
Core Prowler is not currently legal in Standard per Scryfall's legality feed.
What does Core Prowler do?
Core Prowler is an Artifact Creature — Phyrexian Horror with mana cost {4}. Its Oracle text reads: "Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.) When this creature dies, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)".