Metalspinner's Puzzleknot is a common Artifact card from Kaladesh (KLD), collector number 221. Current market price: $0.14 (foil $0.40), TCGplayer market prices via Scryfall.
When this artifact enters, you draw a card and you lose 1 life. {2}{B}, Sacrifice this artifact: You draw a card and you lose 1 life.