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You may choose not to untap this creature during your untap step.


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: Put target creature card from a graveyard onto the battlefield under your control. When this creature becomes untapped or you lose control of this creature, exile that creature.
If Coffin Queen leaves the battlefield before its ability resolves, the delayed trigger condition can never be fulfilled, so the creature will not be exiled. If Coffin Queen is untapped when its ability resolves, the creature will not be exiled until the next time Coffin Queen becomes untapped.