Trolls, Ogres, and Orcs, Oh My!

Objectives
Kill War Master Voone, Highlord Omokk, and Overlord Wyrmthalak.
 * slain
 * slain
 * slain

Description
The black dragonkin Overlord Wyrmthalak oversees the forces of the Lower Spire, who are nearly prepared to launch a a full assault on the Dark Iron Dwarves far below. We simply cannot allow the black dragonflight to gain control of the mountain!

You must kill War Master Voone, Highlord Omokk, and Overlord Wyrmthalak. Their deaths will cause the army's momentum to grind to a halt and will buy us valuable time.

("Their vicious leader.")

Rewards
You will also receive:

Progress
These are not mindless beasts you are up against,. It is a massive army backed by the ruthless black dragonflight. Exercise caution in these corridors.

Completion
Pardon my saying so, but I am surprised you completed the task I set out before you alive. Those monsters were responsible for the deaths of countless thousands, a great many of them heroes still spoken highly of to this day.

You have earned my respect and a reward for your courage.