Karsoluthiyl

Karsoluthiyl is a drow city located beneath the Trackless Sea, west of the mouth of the River Chionthar.

Within the city the Jaezred Chaulssin established a hidden fosterage. During the War of the Spider Queen the members of the brotherhood weakened the hold of the ruling Matron Mothers and helped the male-dominated merchant houses to gain influence.

Two prominant houses are House Tanor'Thal and House Lysaen. Both houses are big players in the slave trade of Skullport. Tanor'Thal has an outpost on the 5th level of Undermountain called Kyorlamshin, while Lysaen are expanding into the 3rd level.