Luskan Underground

Principal among the underground factions in Luskan is the organization known as Bregan D’aerthe. Founded by the infamous drow mercenary Jarlaxle Baenre, Bregan D’aerthe has taken hold in the ruins beneath Luskan and infiltrated the Ships themselves. Other criminal groups in Luskan include the Dead Rats, a gang that includes a number of wererats among their members, and the Dragonbloods, a feared organization rumored to be dealing in the slave trade, one of the few criminal enterprises frowned upon in the City of Sails.

SOURCE: https://swordcoast.com/content/soronil-noonshadow