Mairsil, the Pretender

Legendary Creature — Human Wizard    (CMC:4)

When Mairsil, the Pretender enters the battlefield, you may exile an artifact or creature card from your hand or graveyard and put a cage counter on it. Mairsil, the Pretender has all activated abilities of all cards you own in exile with cage counters on them. You may activate each of those abilities only once each turn.

041 C17 • ENIzzy

™ & © 1993— Wizards of the Coast

Notes: TODO: Update Copyright

Legal in: Legacy,Vintage,Commander

Oracle Text (click to copy):

Mairsil, the Pretender {1}{U}{B}{R} Legendary Creature — Human Wizard When Mairsil, the Pretender enters the battlefield, you may exile an artifact or creature card from your hand or graveyard and put a cage counter on it. Mairsil, the Pretender has all activated abilities of all cards you own in exile with cage counters on them. You may activate each of those abilities only once each turn. 4/4

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View this MTG card on Gatherer

8/25/2017
The exiled cards remain exiled with cage counters when Mairsil leaves the battlefield. If Mairsil returns to the battlefield, it will see all of those exiled cards with cage counters on them.
8/25/2017
If another player gains control of Mairsil, it will have the abilities of only cards that player owns in exile with cage counters on them.
8/25/2017
Activated abilities contain a colon. They’re generally written “[Cost]: [Effect].” Some keyword abilities (such as equip) are activated abilities and will have colons in their reminder text. Mairsil won’t gain triggered abilities (which start with “when,” “whenever,” or “at”).
8/25/2017
If an activated ability of a card in exile with a cage counter on it references the card it’s printed on by name, treat Mairsil’s instance of that ability as though it referenced Mairsil by name instead. For instance, if Mairsil exiles Magus of the Mind, the cost to activate the ability includes sacrificing Mairsil, not sacrificing Magus of the Mind.
8/25/2017
If one of Mairsil’s abilities is countered, most likely because its target became illegal before it resolved, it can’t be activated again in the same turn.
8/25/2017
If multiple cards exiled with cage counters on them have the same ability, Mairsil will have multiple instances of that ability. Each may be activated once each turn.
8/25/2017
If you have a creature enter the battlefield as a copy of Mairsil, its first ability triggers. You won’t be able to activate any abilities before the “legend rule” applies, but the triggered ability will still let you exile another card with a cage counter regardless of which Mairsil you keep.
8/25/2017
If Mairsil gains an activated ability that’s normally linked to a non-activated ability of the card it came from, the ability Mairsil has isn’t linked to any ability. For example, if Mairsil exiles Prototype Portal, the activated ability creates no tokens at all; it doesn’t create Prototype Portal tokens.
8/25/2017
If Mairsil gains an activated ability that’s normally linked to another activated ability of the card it came from, those two abilities Mairsil gains are linked for as long as Mairsil remains on the battlefield. For example, if Mairsil exiles Izzet Chemister, cards exiled with the first ability Mairsil gained from Izzet Chemister can be cast if you activate the second ability it gained that way. Izzet Chemister itself can’t be cast this way, and if Mairsil leaves the battlefield before activating that second ability, the cards exiled with that first ability are lost forever.
8/25/2017
If Mairsil has a crew ability, creatures can crew Mairsil. It’ll become an artifact creature, but its power and toughness remain unchanged.
8/25/2017
If Mairsil has an equip ability, activating it won’t cause anything to happen. Mairsil doesn’t become attached to a creature. They may remain friends.

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Card Mairsil, the Pretender is not on TCGPlayer.