Quest
The Great One
- Location
- Everywhere
My brain is giving a slightly bonkers solution. What if we use Substance of Shadow to make the expert become invisible, silent, and insubstantial and then have Mathilde carry them to the citadel entrance? Presumably Mathilde can sneak down there and the spell should reduce most of the problems of their own stealth skill and if there is a problem, they can bug out on a Shadow Horse.The Venn diagram between architectural experts and stealth is pretty much untouching among the Dwarves, so it would definitely be a challenge.
The only places you could get an angle on the entrance would be at the lip of the caldera, which would be fully exposed to being seen from both the citadel and the caldera.
We need to have the target in shadows, but we might be able to get away with covering the dwarf with a blanket.