Robe of Stars is a mythic Artifact — Equipment card from Special Guests (SPG), collector number 121. Current market price: $16.04 (foil $21.79), TCGplayer market prices via Scryfall.
Equipped creature gets +0/+3. Astral Projection — {1}{W}: Equipped creature phases out. (Treat it and anything attached to it as though they don't exist until its controller's next turn.) Equip {1}