Woodweaver's Puzzleknot is a common Artifact card from Kaladesh (KLD), collector number 240. Current market price: $0.06 (foil $0.86), TCGplayer market prices via Scryfall.
When this artifact enters, you gain 3 life and get {E}{E}{E} (three energy counters). {2}{G}, Sacrifice this artifact: You gain 3 life and get {E}{E}{E}.