Murder's Mark - No D11 room description.

[Sliska Zafir]

Jim Groves - maybe you can write one? Thank you - Dale

[Bearded Ben]

Disco room easter egg?

[Jim Groves]

On it! Let me see what happened there.

[Jim Groves]

Damn this one is all my fault. The Developers are completely innocent. My turnover does not contain an entry for that hallway.

That being said, it is fairly "what you see is what you get".

Spoiler:

This is a rough earthen passage which runs north out of Ilusrian where it opens into a concealed opening in the forest. This is how the guild gets out of town and makes contact with the Nisku tribe without ever being spotted. The southern end leads to the docks where stolen freight is brought to the hideout. The DCs for the secret doors are mentioned in the text but they're both DC 15 Perception to locate.

The Gilded Hands didn't build all of these tunnels, some of them were in place when the original foundation was intended to be a mobilization point against military forces Ilsur thought might come from Korvosa or Magnimar. Sadly he overestimated their interest, and as you can see with his death they sort of became insular farmers and fisherman (with a military bent). But he thought one day he was going to depose the monarchy, and they might seek his army's death before then.. time and age got the best of everyone, and the building sort of moldered until Borvius bought and re-purposed it.