Treasure Mage is a uncommon Creature — Human Wizard card from Mirrodin Besieged (MBS), collector number 34. Current market price: $0.32 (foil $2.14), TCGplayer market prices via Scryfall.
When this creature enters, you may search your library for an artifact card with mana value 6 or greater, reveal it, put it into your hand, then shuffle.