Rimed Sealscape

{t}: Add {w} or {u}.
Sealed 5 — When this card enters the battlefield, look at the top 5 cards of your library, exile one of those cards facedown behind this card. Put the rest at bottom of your library in any order. You may look at the exiled card anytime. When Rimed Sealcape is destroyed, you may cast the exiled card without paying its mana cost.