This quest is not available in game.
Watcher Jhang wants you to find and slay Warlord Kalithresh inside Coilfang Reservoir.
- Kill Warlord Kalithresh
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.