Quest:The Warlord's Hideout

Objectives
Watcher Jhang wants you to find and slay Warlord Kalithresh inside Coilfang Reservoir.
 * slain

Description
There are benefits to hiding very, very quietly at the entrance of your enemy's hideout. Just hours ago I saw a group of naga go through the stone archway on the second tunnel from the left. I'm not well versed in their language, yet I clearly understood one word: Kalithresh. That must be the entrance to the steam vaults, where Warlord Kalithresh has been commanding his troops from. You must find him and stop him. I am too weak to be of any assistance.

Reward
You will also receive:

Completion
Our biggest enemy in the region is finally dead. You've done the expedition a great favor, &lt;name&gt;. We shall be forever in your debt.

Gains
Upon completion of this quest you will gain:
 * 19000 XP (or at level 70)
 * 500 reputation with Cenarion Expedition