Creature â Merfolk Soldier
When Sentinel of the Pearl Trident enters the battlefield, you may exile target historic permanent you control. If you do, return that card to the battlefield under its owner's control at the beginning of the next end step. (Artifacts, legendaries, and Sagas are historic.)
Jonas De Ro
The exiled card will return to the battlefield at the beginning of the next end step even if Sentinel of the Pearl Trident 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 an opponentâ€™s permanent with hexproof, 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 Sentinel of the Pearl Trident 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.
A card, spell, or permanent is historic if it has the legendary supertype, the artifact card type, or the Saga subtype. Having two of those qualities doesnâ€™t make an object more historic than another or provide an additional bonusâ€”an object either is historic or it isnâ€™t.