Skyclave Apparition is a rare Creature — Kor Spirit card from Game Day Promos (GDY), collector number 2. Current market price: — (foil $8.16), TCGplayer market prices via Scryfall.
When this creature enters, exile up to one target nonland, nontoken permanent you don't control with mana value 4 or less. When this creature leaves the battlefield, the exiled card's owner creates an X/X blue Illusion creature token, where X is the mana value of the exiled card.