Dheubpurcwenpyl

Dheubpurcwenpyl was one of the most powerful Deep dragon in the Underdark in 1370 DR.

She was so powerful that nobody challenged her authority and even the nearby drow of Guallidurth were forced to skirt her domain and even revered her as Queen of the Deeps. Many had mistaken Dheubpurcwenpyl as a Shadow dragon leading some scholars to believe that she know a spell that transform herself in a shadow being.

Lair
Dheubpurcwenpyl had in her hoard most of the lost treasure of Old Shanatar. Her lair was in the Rift of Dhalnadar, a great chasm south of the Marching Mountains famous for waterfalls and jungles.