In the Sixteenth Hall, defilers and other Orcs, sworn to some dark power, poison their brethren with a fungal disease. The source of this evil lies far beneath the surface of this stronghold, once inhabited by the dwarves. The Dwarves in Moria wish only to drive the Orcs and the evil of the Sixteenth Hall away from their former realm.
The Lost One is below the Sixteenth Hall, south-east of the Twenty-first Hall.
You have been challenged to prove your great worth by defeating the Lost One without making the battle easier by killing his summoned gredbyg.