The exiled card will return to the battlefield at the beginning of the next end step even if Glimmerpoint Stag is no longer on the battlefield at that time.
If the exiled card is an Aura, that cardâ€™s owner chooses what it will enchant as it comes back onto the battlefield. An Aura put onto the battlefield this way doesnâ€™t target anything (so it could be attached to a permanent with shroud, for example), but the Auraâ€™s enchant ability restricts what it can be attached to. If the Aura canâ€™t legally be attached to anything, it remains exiled.
If Glimmerpoint Stag somehow enters the battlefield during a turnâ€™s end step, the exiled card wonâ€™t be returned to the battlefield until the beginning of the following turnâ€™s end step.
If a token is exiled this way, it ceases to exist and wonâ€™t return to the battlefield.
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