Windbrisk Heights [From the Vault: Realms]

Hideaway 4 (When this land enters the battlefield, look at the top four cards of your library, exile one face down, then put the rest on the bottom in a random order.)
Windbrisk Heights enters the tapped battlefield.
{T}: Add {W}.
{W}, {T}: You can play the exiled card without paying its mana cost if you attack with three or more creatures this turn.