Coiling Oracle is a common Creature — Snake Elf Druid card from Ravnica Remastered (RVR), collector number 361. Current market price: $0.27 (foil $0.41), TCGplayer market prices via Scryfall.
When this creature enters, reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, put that card into your hand.