Coiling Oracle is a uncommon Creature — Snake Elf Druid card from Conspiracy: Take the Crown (CN2), collector number 200. Current market price: $0.34 (foil $2.75), 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.