Valsharess " For the word as a generic term , see Drow dictionary . " The Valsharess ( meaning " queen " or " empress " ) was the name adopted by a female drow who gained great power and influence after the binding of Mephistopheles , one of the Archdukes of Hell , and using the devil in her service . She was originally just another matron mother , and it is not known how she managed to bind Mephistopheles . With the help of the devil , she managed to conquer much of the Underdark during the Silence of Lolth . After this , she even went on to imprison Halaster Blackcloak and start attacking Waterdeep through Undermountain . Meanwhile , Mephistopheles planned to get free by using a famous adventurer , a student of Drogan Droganson , who had acquired an artifact of Mephistopheles . The adventurer did not know the nature of the artifact , but it was in fact meant for the leader of a cult of Mephistopheles , and bound its carrier to the archdevil . When the adventurer came to Waterdeep to help stop the drow attacks , the Valsharess was led to believe - likely by Mephistopheles - that they would be her doom if she did not act in time . However , they survived her assassination attempt ( due to being awakened by a vision that could also have been sent by Mephistopheles ) , and proceeded to descend through Undermountain and free Halaster Blackcloak . Halaster had in fact been waiting to set up a trap for the Valsharess when she would come to gloat at him , and now had to settle for putting a geas on the adventurer that bound them to kill the Valsharess , before sending them to the Underdark , to Lith My ' athar . Lith My ' athar was at this point the seat of the resistance against the Valsharess in the area , housing both the Seer and her Eilistraee - worshiping group and house Mae ' Vir , more typical drow but still aligned against the Valsharess . The adventurer was sent out on missions to weaken the Valsharess ' s forces by depriving her of her allies , which included Zorvak ' Mur , a settlement of illithid s ; beholder s ; and a number of undead being created by the vampire worshipers of Vix ' thra , a dracolich . Before her final attack the Valsharess appeared to the adventurer in a dream and attempted to seduce them to join her , betraying the defenders of Lith My ' athar . The ultimate result of the final battle was in any case that the adventurer was brought into Mephistopheles ' presence , imprisoned by his powers , at which point the archdevil was finally able to break partly free from the Valsharess ' s power . She ordered him to kill the adventurer , not knowing they carried his relic and that this was against the rules the binding she had placed on him . Instead , he let the adventurer free , and they dueled and killed the Valsharess . Her death left Mephistopheles himself loose upon Toril . Described as exceptional even among the drow , the Valsharess possessed much the same traits as most drow with great power ; extreme arrogance and an an inflated sense of her own importance . She was very powerful even by herself , without Mephistopheles backing her up . Among her more dangerous servants were the Red Sisters , an elite band of assassins .