Nildar Aleantyl

Nildar Aleantyl was an independent researcher and real estate broker in Bullion Heights, the wealthy district of Menzoberranzan. He was both a highly accomplished businessman and a remarkably skilled wizard, and he often used both of these skills to his advantage. Shortly before his assassination by the player party in OttL, he was working on a Moon Plague  "treatment" whereby he suppressed one of the two souls living within a single body.  The spell was temporary, therefore requiring regular maintenance, but allowed for the non-suppressed entity to live a relatively normal life.  He had some Retrievers in his service hunting plague patients, willing or otherwise, and often attempted to bribe or coerce his patients to use their newfound freedom to work for either himself or the church of Lolth.
He is currently deceased, and no longer within the known multiverse, having been exiled along with the rest of Gehenna.