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Complete The Emissary by collecting the Emissary’s Seal in the poison-gas area at Valley of Ashes, finding the Emissary’s Letter after Slaughtermill, investigating the hidden camp, and opening the final route at Fortress. The quest ends when you interact with the red cloth beside the blocked gate, rewarding a Sands of Time consumable.

Quest route at a glance

Stage Location and Lantern Required action
1 Valley of Ashes > The Other Side Take the Emissary’s Seal from a carriage in the poison area.
2 Vale of Wrath > Old Windmill After Slaughtermill, collect the Emissary’s Letter from the tunnel.
3 Valley of Ashes > The Other Side Follow the poison route to the concealed camp, read the note, and inspect the body.
4 Fortress > The Other Side Shoot the train-car weak spot and interact with the red cloth at the gate.

1. Collect the Emissary’s Seal

Fast-travel to the Valley of Ashes > The Other Side Lantern. Enter the poison-gas area on the left and proceed through it until you reach a carriage partway along the route.

Inside the carriage, take the key item named Emissary’s Seal from the table. You need this item before the hidden-camp investigation can advance.

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Getting through the poison

  • Keep to the intended path rather than wandering through the gas-covered ground.
  • Use visible terrain and structures as landmarks so you can retrace the route after obtaining the letter.
  • If you are taking damage quickly, move decisively between safe sections instead of stopping in the gas.

2. Find the Emissary’s Letter after Slaughtermill

Travel to Vale of Wrath > Old Windmill. The letter becomes available immediately after you defeat the Slaughtermill boss.

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From the platform, walk down the tunnel. After a short distance, check the right-hand side for the note titled Emissary’s Letter. It is easy to pass if you keep moving straight down the tunnel, so deliberately scan the right wall and floor as you leave the arena.

3. Investigate the hidden camp

Return to Valley of Ashes > The Other Side once you have both the seal and the letter. Re-enter the poison area and follow the route down the hill. Continue along the path until you reach a camp concealed by the poison.

  1. Enter the hidden camp.
  2. Pick up the note lying on the ground.
  3. Interact with the body in the middle of the camp.

Both interactions are required. Reading the note alone does not finish this stage; make sure the body examination prompt has been used before leaving.

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4. Open the route at Fortress

Go to Fortress > The Other Side. Near the poison, a train car blocks the route. Shoot the train car’s marked weak spot to open the way forward.

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If the weak spot is out of view

The correct target can be difficult to see from ground level. Climb to the area above the cliffs and aim down at the train car. The elevated angle exposes the weak spot and is the reliable solution when nearby terrain prevents a clear shot.

5. Complete The Emissary

Proceed through the opening created by the destroyed train-car section. At the blocked gate, look for the red cloth beside it and interact with the cloth. This interaction completes The Emissary and grants a Sands of Time consumable.

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Can the quest be missed?

The Emissary is not identified as a missable quest. The published quest guidance states that, apart from The Choir, side quests can be started and completed after the story. If you have already finished the main narrative, revisit the listed Lanterns and follow the same sequence.

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Some side quests include dialogue choices that change their outcome. Those choices do not alter the side-quest reward in the cited guidance, and no alternate reward route is established for The Emissary.

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Quick troubleshooting checklist

  • No seal: Confirm you entered the poison area from Valley of Ashes > The Other Side and searched the table inside the carriage.
  • No letter: Defeat Slaughtermill first, then walk down the tunnel from the Old Windmill platform and check the right side.
  • Camp does not advance: Pick up the ground note and interact with the body in the camp’s center.
  • Train car will not open: Move above the cliffs and shoot the weak spot from an elevated, downward angle.
  • Gate interaction missing: Confirm the train-car route has opened, then inspect the red cloth next to the blocked gate.

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