Karsoluthiyl

Karsoluthiyl was 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 gain influence.

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