Disciple of Caelus Nin is a rare Creature — Human Wizard card from The Brothers' War Commander (BRC), collector number 21. Current market price: $0.29 (foil $0.41), TCGplayer market prices via Scryfall.
When this creature enters, starting with you, each player chooses up to five permanents they control. All permanents other than this creature that weren't chosen this way phase out. Permanents can't phase in.