|Race||Lich, formerly Drow|
|Age||Over 2,000 years old|
In addition to his large magical and political power, the Lichdrow had lived for at least two milennia, and he was once shown to contemplate his possible ascension to divinity in the future. Thus, before his death, he was probably one of the most powerful magic users in the Underdark. His only rivals in power, in fact, were possibly the archmage of Menzoberranzan himself—Gromph Baenre—and Jalynfein the Spider Mage.
During the War of the Spider Queen, as the priestesses of Lolth and the matriarchal society which they ruled were weakened and exposed, the Lichdrow visited the archmage of Menzoberranzan, Gromph Baenre, to encourage him to join the revolution. Dyrr suggested that together they could overthrow the priestesses and turn Menzoberranzan into some kind of (possibly patriarchal) magocracy. Gromph Baenre refused, and the two most powerful wizards of Menzoberranzan were left on opposing sides. Several lengthy spell battles ensued, in which Gromph Baenre was eventually victorious. Due to the Lichdrow's ability to regenerate at his phylactery, however, he ultimately remained undefeated. With his sister Triel Baenre's help, Gromph infiltrated House Agrach Dyrr and destroyed the Lichdrow's phylactery, which was cunningly hidden in House Agrach Dyrr's temple's guardian golem and protected by many powerful defenses. As a last revenge, the Lichdrow had weaved the master ward of House Agrach Dyrr such that if his phylactery was destroyed, an explosion of gigantic proportions would ensue while a dimensional lock prevented magical escape (and physical escape would be made impossible due to the distance that would have to be covered in the short time between activation of the ward and explosion). Gromph Baenre escaped due to a contingency spell he had placed upon his person prior to his infiltration of House Agrach Dyrr, leaving the Lichdrow finally and comprehensively destroyed.
As a powerful magic user, Lord Dyrr had access to many potent magical items, as well as having access to the entire armory of House Agrach Dyrr. His favorite weapon, however, was his Staff of Withering.