Your plan is working. You've nearly succeeded in capturing the Southron caravan, but The Black Serpent himself holds the last token you need to infiltrate Cirith Gurat. He will not surrender it willingly...

When Revealed: Randomly select 1 set aside Harad objective and attach it to The Black Serpent. Shuffle the encounter discard pile into the encounter deck and reveal 1 encounter card per player.

If a Harad objective is not attached, the first player claims it and attaches it to a hero he controls.

While there are at least 6 progress tokens on this stage, the Black Serpent loses the text: "Cannot leave the staging area or take damage."

This stage cannot be defeated unless each Harad objective in play is attached to a hero. If the players defeat this stage, they win the game.