What a Guy
After the party avoided his plan, he fled to House Nocturne to escape the wrath of his Masters. Unfortunately, to no avail. Although he attempted to ruin his body as a host by subjecting himself to vampirism, it did not stop his Mind Flayer masters from using him as a host.
The party confronted him on the roof of the Nocturne Tower. Now a Drow/Vampire/Illithid, he could not contain that which his body was forced to undergo. He was slain at the hands of the adventurers, released from the pain and punishment he underwent.