the Seers of Ghrond (WAR History and Lore)  

In order to obtain this unlock, you must kill the Seer of Ghrond at 61k/6.5k overlooking the Greenskin camp.

Around these coordinates, just off the path, you will see a boulder surrounded by red flowers and flanked with fir trees. A lantern also burns right in front of this boulder. Make your way to the back side of the rock to find the Seer.

History & Lore in Ellyrion