Speak to Gorsik the Tumultuous in the Crimson Expanse.
This is most definitely magic in origin. Not even druidic. I suspect one among the stone troggs to the north.
Go to Gorsik and point him in their direction. Hopefully this will help earn his favor.
You will also receive:
- 11,000 experience
- 2 15
- 250 reputation with Therazane