Mycosynth Wellspring is a common Artifact card from New Phyrexia (NPH), collector number 145. Current market price: $0.20 (foil $3.49), TCGplayer market prices via Scryfall.
When this artifact enters or is put into a graveyard from the battlefield, you may search your library for a basic land card, reveal it, put it into your hand, then shuffle.