Augur of Bolas is a common Creature — Merfolk Wizard card from The List (PLST), collector number MM3-30. Current market price: $0.27, TCGplayer market prices via Scryfall.
When this creature enters, look at the top three cards of your library. You may reveal an instant or sorcery card from among them and put it into your hand. Put the rest on the bottom of your library in any order.