Gates of Isengard
The Treason of Saruman #54 (x1)
3 (1)

Immune to player card effects.

Forced: When the Gates of Isengard is explored, each player searches the encounter deck and discard pile for an enemy and puts it into play engaged with him. Shuffle the encounter deck.

Here through the black rock a long tunnel had been hewn, close at either end with mighty doors of iron. –The Two Towers