He was come to the heart of the realm of Sauron and the forges of his ancient might, greatest in Middle–earth; all other powers were here subdued.
–The Return of the King

When Revealed: Shuffle the encounter discard pile into the encounter deck and discard cards from the top until X enemies are discarded, where X is the number of players. Add each enemy discarded this way to the staging area.

Dire. Allies cannot enter play and 'when revealed' effects cannot be canceled.

Forced: When Mount Doom is explored, the first player makes a Fortitude test. Discard 1 extra encounter card for each player. If the first player fails this test, the Ring-bearer claims The One Ring and the players lose the game. If the test is successful, the Ring-bearer completes the quest and the players win the game.