Courser of Kruphix is a special Enchantment Creature — Centaur card from Time Spiral Remastered (TSR), collector number 359. Current market price: $2.52 (foil $16.74), 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.