The Pandorica
Legendary Artifact
Oracle Text
You may choose not to untap The Pandorica during your untap step.
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: Untap another target nonland permanent, then it phases out. It can't phase in for as long as The Pandorica remains tapped. When The Pandorica becomes untapped or leaves the battlefield, that permanent phases in. Activate only as a sorcery.
Rulings (7)
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Wizards of the CoastAbilities that trigger when a creature becomes tapped won't trigger when a creature phases in tapped. (This might happen if the creature in question has one or more stun counters on it.)
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Wizards of the CoastAny one-shot effects that are waiting "until [this] leaves the battlefield," won't happen when a permanent phases out.
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Wizards of the CoastChoices made for permanents as they entered the battlefield are remembered when they phase in.
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Wizards of the CoastAny continuous effects with a "for as long as" duration ignore phased-out objects. Any such effects will expire if their conditions are no longer met after ignoring the phased-out objects.
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Wizards of the CoastEach Aura and Equipment attached to a permanent that's phasing out also phases out. They will phase in with that permanent and still be attached to it. Similarly, permanents that phase out with counters phase in with those counters.
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Wizards of the CoastWhile a permanent is phased out, it's treated as though it doesn't exist. It can't be the target of spells or abilities, its static abilities have no effect on the game, its triggered abilities can't trigger, it can't attack or block, and so on.
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Wizards of the CoastPhasing out doesn't cause any "leaves the battlefield" abilities to trigger. Similarly, phasing in won't cause any "enters the battlefield" abilities to trigger.