Kill Lorgus Jett in Blackfathom Deeps and then return to Je'neu Sancrea in Ashenvale.
This Twilight's Hammer follower cannot be allowed to complete his plan. The Twilight's Hammer do not understand the spirits of nature. They believe in the Old Gods--creatures of chaos and destruction that were long ago defeated. This Lorgus cannot be allowed to succeed. You must stop him, [player]. I cannot do it myself--I am too weak.
Go into Blackfathom Deeps, find him, and kill him. Return to me here at Zoram'gar when it's done.