Sai, Master Thopterist is a mythic Legendary Creature — Human Artificer card from Foundations Commander (FDC), collector number 5. Current market price: — (foil $0.67), TCGplayer market prices via Scryfall.
Whenever you cast an artifact spell, create a 1/1 colorless Thopter artifact creature token with flying. {1}{U}, Sacrifice two artifacts: Draw a card.