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Flash
Quand Rhys arrive, une autre créature ciblée que vous contrôlez acquiert la persistance jusqu'à la fin du tour. (Quand elle meurt, si elle n'avait pas de marqueurs -1/-1 sur elle, renvoyez-la sur le champ de bataille sous le contrôle de son propriétaire avec un marqueur -1/-1 sur elle.)

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: Retirez n'importe quel nombre de marqueurs d'une créature ciblée que vous contrôlez. N'activez que lorsque vous pourriez lancer un rituel.
If the target creature dies but that card leaves the graveyard before the persist ability resolves, it won't be returned to the battlefield.
If a creature has +1/+1 counters and -1/-1 counters on it, state-based actions remove the same number of each so that it has only one kind of those counters on it. A creature's persist ability can bring it back again if its -1/-1 counters are removed this way.
If a creature with persist that has +1/+1 counters on it receives enough -1/-1 counters to cause it to be destroyed by lethal damage or put into its owner's graveyard for having 0 or less toughness, persist won't trigger and the card won't return to the battlefield. That's because persist checks the creature as it last existed on the battlefield, and it still had -1/-1 counters on it at that point.