Contagion Clasp is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.
Official card text
When this artifact enters, put a -1/-1 counter on target creature.,
: Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
How it works : Contagion Clasp
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
An ability that triggers "Whenever you proliferate" triggers even if you chose no permanents or players while doing so.
No other card is named in this ruling.
- #2· Wizards of the Coast
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.
No other card is named in this ruling.
- #3· Wizards of the Coast
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.
No other card is named in this ruling.
- #4· Wizards of the Coast
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.
No other card is named in this ruling.
- #5· Wizards of the Coast
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.
No other card is named in this ruling.
- #6· Wizards of the Coast
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.
No other card is named in this ruling.
- #7· Wizards of the Coast
Contagion Clasp's first ability is mandatory. If you're the only player who controls a creature, you must target one of them.
No other card is named in this ruling.
Popular combos
Real combos played by the community, sorted by popularity.
Tekuthal, Inquiry Dominus + Magistrate's Scepter + Coretapper + Contagion Clasp
- 1Activate Coretapper's first ability by tapping it, putting a charge counter on Magistrate's Scepter.
- 2Activate Contagion Clasp by paying and tapping it, proliferating twice, putting two additional charge counters on Magistrate's Scepter.
- 3Activate Magistrate's Scepter's second ability by tapping it and removing three charge counters from it, taking an extra turn after this one.
- 4Repeat each turn.
Magosi, the Waterveil + Nesting Grounds + Contagion Clasp
- 1Activate Contagion Clasp by paying and tapping it, putting an eon counter on Magosi.
- 2Activate Nesting Grounds's last ability by paying
and tapping it, moving an eon counter from Magosi to Nesting Grounds. - 3Activate Magosi's last ability by tapping it, removing an eon counter from it and returning it to your hand, taking an extra turn after this one.
- 4Play Magosi from your hand.
- 5Move to your next turn.
- 6Activate Contagion Clasp by paying and tapping it, putting an eon counter on Nesting Grounds.
- 7Activate Nesting Grounds's last ability by paying and tapping it, moving an eon counter from Nesting Grounds to Magosi.
- 8Repeat from step 3.
Kurkesh, Onakke Ancient + Magistrate's Scepter + Contagion Clasp
- 1Activate Contagion Clasp by paying and tapping it.
- 2Kurkesh triggers, choose not to pay for the trigger.
- 3Resolve the Contagion Clasp ability, putting a charge counter on Magistrate's Scepter.
- 4Activate Magistrate's Scepter's second ability by tapping it and removing three charge counters from it.
- 5Kurkesh triggers, causing you to pay
to copy Magistrate's Scepter's ability. - 6Resolve both Magistrate Scepter abilities, causing you to take two extra turns after this one.
- 7Move to your next turn.
- 8Activate Magistrate's Scepter's first ability by paying and tapping it.
Aminatou, the Fateshifter + Teferi, Master of Time + Contagion Engine + Contagion Clasp
- 1Activate Contagion Engine by paying and tapping it, putting two loyalty counters on each planeswalker you control.
- 2Activate Contagion Clasp by paying and tapping it, putting a loyalty counter on each planeswalker you control.
- 3Activate Ajani's second loyalty ability by removing two loyalty counters from it, putting a loyalty counter on each other planeswalker you control.
- 4Activate Teferi's third loyalty ability by removing ten loyalty counters from it, causing you to take two extra turns after this one.
- 5Activate Aminatou's second loyalty ability by removing a loyalty counter from it, blinking Teferi.
- 6Activate Teferi's first loyalty ability by putting a loyalty counter on it, causing you to loot.
- 7Move to your first extra turn.
- 8Activate Teferi's first loyalty ability by putting a loyalty counter on it, causing you to loot.
The Legend of Kuruk // Avatar Kuruk + Contagion Clasp + Baboon Spirit
- 1Activate Avatar Kuruk by paying
minus for each creature and/or artifact you can tap while activating it, causing you to take an extra turn after this one. - 2Activate Baboon Spirit by paying
, exiling Avatar Kuruk. - 3At the beginning of your end step, Baboon Spirit triggers, returning The Legend of Kuruk from exile to the battlefield with a lore counter on it.
- 4The Legend of Kuruk's first chapter ability triggers, causing you to scry 2 and draw a card.
- 5Move to your next turn. At the beginning of your precombat main phase. The Legend of Kuruk triggers, putting a lore counter on it. Its second chapter ability then triggers, causing you to scry 2 and draw a card.
- 6Activate Contagion Clasp by paying and tapping it, causing you to proliferate and put a lore counter on The Legend of Kuruk.
- 7The Legend of Kuruk's third chapter ability triggers, causing you to exile it and return it to the battlefield as Avatar Kuruk.
- 8Repeat.
The Legend of Kuruk // Avatar Kuruk + Contagion Clasp + The Mighty Thor, Jane Foster
- 1Activate Avatar Kuruk by paying minus for each creature and/or artifact you can tap while activating it, causing you to take an extra turn after this one.
- 2At the beginning of your end step, The Mighty Thor triggers, blinking Avatar Kuruk and causing it to return to the battlefield as The Legend of Kuruk with a lore counter on it.
- 3The Legend of Kuruk's first chapter ability triggers, causing you to scry 2 and draw a card.
- 4Move to your next turn. At the beginning of your precombat main phase. The Legend of Kuruk triggers, putting a lore counter on it. Its second chapter ability then triggers, causing you to scry 2 and draw a card.
- 5Activate Contagion Clasp by paying and tapping it, causing you to proliferate and put a lore counter on The Legend of Kuruk.
- 6The Legend of Kuruk's third chapter ability triggers, causing you to exile it and return it to the battlefield as Avatar Kuruk.
- 7Repeat.
Magosi, the Waterveil + The Ozolith + Nature's Revolt + Contagion Clasp
- 1During your precombat main phase, activate Contagion Clasp by paying and tapping it, putting an eon counter on Magosi.
- 2Activate Magosi's third ability by tapping it, removing an eon counter from it and returning it from the battlefield to your hand.
- 3When Magosi leaves the battlefield, The Ozolith's first ability triggers, putting an eon counter on The Ozolith.
- 4Resolve the Magosi ability, causing you to take an extra turn after this one.
- 5Play Magosi.
- 6At the beginning of your combat phase, The Ozolith triggers, putting an eon counter on Magosi.
- 7Repeat each turn.
Medomai the Ageless + Idris, Soul of the TARDIS + Contagion Clasp + Encroaching Mycosynth
- 1Deal combat damage to an opponent using Medomai the Ageless.
- 2Medomai the Ageless triggers, causing you to take an extra turn after this one.
- 3Cast Idris by paying .
- 4When Idris enters the battlefield, it triggers, exiling Medomai the Ageless until Idris leaves the battlefield.
- 5Move to your extra turn.
- 6At the beginning of your upkeep, Idris's vanishing ability triggers, removing a time counter from it.
- 7Activate Contagion Clasp by paying and tapping it, putting a time counter on Idris.
- 8Deal combat damage to an opponent using Idris.
Legal formats
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Meta decks with Contagion Clasp
No archived Top 8 deck with this card yet.