Leif, Arcane Prodigy

Eminence — If Leif is in the command zone or on the battlefield, you may play any card from your
hand facedown as a land of any basic type, as your land for the turn.(Plains, Island, Mountain, Forest, Swamp, or Wastes)

{w}{u}{b}{r}{g},{t}: Exile target facedown card, you
may play that card without paying it's mana cost.