Kela's Sextant

{t}: Add {1} of any color. Lose 1 life.

{1}, {t}: Reveal the top card of your library. If it is a land, put it onto the battlefield tapped. Otherwise, exile it.

Sacrifice Kela's Sextant: Lose half your life. Until end of turn, you may cast one card exiled with Kela's Sextant without paying its mana cost. Put the rest into your hand.