Secluded Sanctuary

({t}: Add {g} or {w} to your mana pool.)
Secluded Sanctuary enters the battlefield tapped.
When Secluded Sanctuary enters the battlefield, reveal the top card of your library. If
it's a land card, untap Secluded Sanctuary.
"Ah! So you're looking for refuge from the war! Then let me show you a place sheltered from the cruelty of the outside world."