Sixteenth Hall - Do No Harm‏  

'Rumours abound that you are of a tougher mould than most, [your class]. I will admit that you look doughty enough, and your eyes are fiercer than many I see. Perhaps you would hold up against a most difficult foe that threatens our cause.

'Beneath the Sixteenth Hall there is a terrible beast known as the Lost One. It summons wretched gredbyg to its aid when it attacks, and they can be quite the hindrance to any that oppose their master. To defeat the Lost One after the threat of gredbyg has been removed would be but a pittance to so mighty a one as yourself.

'Nay, to earn my respect and rise to the challenge I give you, you will take down the Lost One without hurting the gredbyg, however much they harry you. I would advise you to bring friends on this venture if you wish to return in victory.'

In the Sixteenth Hall, shamans 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 once-dwarven stronghold. The dwarves in Moria wish only to drive the Orcs and the evil of the Sixteenth Hall away from their former realm.

Objective 1
Defeat the Lost One
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.

Objective 1
Talk to Sigur
The dwarf Sigurd can be found in the Twenty-first Hall, north-west of the Sixteenth Hall.

Sigurd will be very impressed to hear that you met his challenge of defeating the Lost One while the gredbyg harried your efforts all the while.