This criminal/slaver network is one of the most powerful on the Sword Coast and often acts as a buffer against other evil organizations unintentionally. They have a massive stronghold on Skullport Island, but are otherwise largely active in Waterdeep.
Members of the guild are trained in stealth, discretion, and tactics, with fighters, rogues, sorcerers, wizards, and experts which comprise most of its numbers. An ever-growing organization, it utilizes multiple mouthpieces to protect and conceal the identity of the Xanathar. To join, a member has to prove their ruthlessness, obedience, and loyalty by committing a serious crime - killing or selling a friend or family member into slavery, as well as paying 300gp.