Trinket Mage is a uncommon Creature — Human Wizard card from Scars of Mirrodin (SOM), collector number 48. Current market price: $0.28 (foil $8.14), TCGplayer market prices via Scryfall.
When this creature enters, you may search your library for an artifact card with mana value 1 or less, reveal that card, put it into your hand, then shuffle.