Arwen Colles

Hideaway 4 (When this land enters, look at
the top four cards of your library, exile one
face down, then put the rest on the bottom in
a random order.)
Arwen Colles enters tapped.
{t}: Add {r}.
{r}, {t}: You may play the exiled card without paying its mana cost if an opponent was dealt
7 or more damage this turn.