What strategies do they use to avoid detection? How does one contact them? What role does the illithid play? GMs are supposed to be able to use this, so you need to provide the background details, not just what PCs might know.
Format wise, there are inconsistent capitalizations and spelling errors.
Using demons and summoned monsters to perform assassinations is a bit interesting, especially if the victims are PC's. Go to Comment
The PCs are setting up camp at the end of their first day of walking through the Esh-Inel Mountains, when they hear in the distance a low rumbling, like thunder. It grows progressively louder until it echoes off the mountainous bowls around them, then dies away again. At its worst the ground starts trembling. It happens every day at this time, and it is the noise of the Great Carts on the dwarfish underways returning home after a day mining, laden with many tons of ore.