Automatic Librarian is a common Artifact Creature — Construct card from Dominaria United (DMU), collector number 229. Current market price: $0.19 (foil $0.26), TCGplayer market prices via Scryfall.
When this creature 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.)