Astral Slide
Enchantment
Whenever a player cycles a card, you may exile target creature. If you do, return that card to the battlefield under its owner's control at the beginning of the next end step.
"The hum of the universe is never off-key." —Mystic elder
Ron Spears
Rulings
If a face-down card is exiled, it turns face-up and remains face-up when it returns to the battlefield. This does not trigger any abilities that would trigger on it being turned face-up.
(wotc • 2008-08-01)
If a player cycles a card during the end step, the creature that is exiled won't come back until the end of the next turn.
(wotc • 2004-10-04)
Rulings
If a face-down card is exiled, it turns face-up and remains face-up when it returns to the battlefield. This does not trigger any abilities that would trigger on it being turned face-up.
(wotc • 2008-08-01)
If a player cycles a card during the end step, the creature that is exiled won't come back until the end of the next turn.
(wotc • 2004-10-04)