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Sacrifice Mistcaller: Until end of turn, if a nontoken creature would enter the battlefield and it wasn't cast, exile it instead.
If Mistcaller enters the battlefield at the same time as other creatures, its ability can’t be activated in time to affect those creatures.
Mistcaller’s ability doesn’t stop creature tokens from entering the battlefield. It also doesn’t affect creatures that are already on the battlefield.
Mistcaller’s ability won’t affect any nontoken creatures that were cast, including ones cast from unusual zones such as your graveyard.
