Trinket Mage is a special Creature — Human Wizard card from Time Spiral Remastered (TSR), collector number 320. Current market price: $3.49 (foil $38.98), 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.