The Eyrie

As The Eyrie enters the battlefield, you may
reveal a Knight card from your hand. If you
don't, The Eyrie enters the battlefield tapped.
{t}: Add {u}, {r}, or {w}.
"The most splendid work ever built by the hands of
men, a palace worthy of the gods themselves. Surely
even the Father Above does not have such a seat."
—Quince