Robe of the Archmagi is a rare Artifact — Equipment card from Battle for Baldur's Gate Promos (PCLB), collector number 91s. Current market price: — (foil $2.12), TCGplayer market prices via Scryfall.
Whenever equipped creature deals combat damage to a player, you draw that many cards. Equip {4} Equip Shaman, Warlock, or Wizard {1}