Courser of Kruphix is a rare Enchantment Creature — Centaur card from The List (PLST), collector number A25-164. Current market price: $1.52, TCGplayer market prices via Scryfall.
Play with the top card of your library revealed. You may play lands from the top of your library. Landfall — Whenever a land you control enters, you gain 1 life.