Windbrisk Heights

Text:

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 battlefield tapped.
: Add .
, : You may play the exiled card without paying its mana cost if you attacked with three or more creatures this turn.

Rulings:

• 10/1/2007 At the time the ability resolves, you’ll get to play the card if you declared three different creatures as attackers at any point in the turn. A creature declared as an attacker in two different attack phases counts only once. A creature that entered the battlefield attacking (such as a token created by Militia’s Pride) doesn’t count because you never attacked with it.