Mishra, Artificer Prodigy is a rare Legendary Creature — Human Artificer card from Time Spiral (TSP), collector number 243. Current market price: $0.44 (foil $16.43), TCGplayer market prices via Scryfall.
Whenever you cast an artifact spell, you may search your graveyard, hand, and/or library for a card with the same name as that spell and put it onto the battlefield. If you search your library this way, shuffle.