Witching Well is a common Artifact card from The List (PLST), collector number ELD-74. Current market price: $0.08, TCGplayer market prices via Scryfall.
When this artifact enters, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.) {3}{U}, Sacrifice this artifact: Draw two cards.