Dimir Guildmage is a uncommon Creature — Human Wizard card from GRN Guild Kit (GK1), collector number 13. Current market price: $0.11, TCGplayer market prices via Scryfall.
({U/B} can be paid with either {U} or {B}.) {3}{U}: Target player draws a card. Activate only as a sorcery. {3}{B}: Target player discards a card. Activate only as a sorcery.