Then there was a crash and a flash of flame and smoke. The waters of the Deeping–stream poured out hissing and foaming: they were choked no longer, a gaping hole was blasted in the wall. A host of dark shapes poured in. –The Two Towers

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

Defense.

Forced: After a character is destroyed, place 1 progress on this stage (bypassing any active location).

If this stage is defeated, the players lose the game.

Over the wall and under the wall the last assault came sweeping like a dark wave upon a hill of sand. –The Two Towers