The Bridge of Khazad-dûm
The Road Darkens#42 (x1)
3A-B (15)
When Revealed: Add The Great Bridge to the staging area. Each player reveals 1 encounter card and removes 1 damage token from Doom, Doom, Doom.

The outer door could only be reached by a slender bridge of stone, without kerb or rail, that spanned the chasm with one curving spring of fifty feet. -The Fellowship of the Ring
No more than 5 progress can be placed on this stage each round.

The players cannot defeat this stage while The Great Bridge is in play. If the players defeat this stage, they win the game.

"Now for the last race!" said Gandalf. "If the sun is shining outside we may still escape. After me!" -The Fellowship of the Ring