Mithral Hall is famed for repelling an invasion force of 20,000 drow from Menzoberranzan, led by Matron Baenre herself, for conquest of the surface. Deep below Mithral Hall, the drow invasion managed to penetrate the Underdark tunnel system in the dwarven kingdom, but not the actual interior. Fighting not only occurred here, but above the surface-eventually catching the attention of Silverymoon and even longaway Longsaddle. The invasion ended completely, however, when the Companions of the Hall met Matron Baenre and her formidable entourage. It was King Bruenor himself, beside himself with grief at the loss of his adopted son, Wulfgar, who drove his axe into Matron Baenre, killing her and sending the departing dark elves back to Menzoberranzan leaderless.