Oust | Magic: The Gathering
Formats Oust is Legal in
Official Oracle Text for Oust
Official Rulings for Oust
6/15/2010 : If the targeted creature's owner has no cards left in his or her library, that creature is put into that library as the only card there.
6/15/2010 : If the targeted creature is a token, it will cease to exist after it's put into its owner's library.
6/15/2010 : Note that the creature's controller, not its owner, is the one who gains life.
6/15/2010 : If the targeted creature is an illegal target by the time Oust resolves, the spell is countered. No one gains life.