Skyclave Apparition [Zendikar Rising Prerelease Promos]

When Skyclave Apparition enters the battlefield, exile up to one target nonland, nontoken permanent you don't control with converted mana cost 4 or less.
When Skyclave Apparition leaves the battlefield, the exiled card's owner creates an X/X blue Illusion creature token, where X is the converted mana cost of the exiled card.