You cannot pass!

Exile target legendary creature you control. At
the beginning of your next upkeep, return that
card to the battlefield under its owner's control
with a +1/+1 counter on it.
Until your next turn, creatures can't attack you.
"I am a servant of the Secret Fire, wielder of the
flame of Anor. You cannot pass. The dark fire will
not avail you, flame of Udun"
—Gandalf, the Grey