Trinket Mage is a common Creature — Human Wizard card from Duel Decks: Elves vs. Inventors (DDU), collector number 41. Current market price: $0.63, 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.