Free the trapped Highborne souls in Night Run and Satyrnaar, then return to Delgren the Purifier at Maestra's Post.
The writing of the orcs is little better than the scribblings of a child. Many of my order scoffed when I chose to learn their tongue, but I have found it beneficial to gain further understanding of my enemies.
From Ilkrud's scribblings, it appears that Athrikus still possesses two soulgems, and they are being held in Night Run and Satyrnaar, satyr-held areas in northeast Ashenvale.
Be careful out there, [player], the satyrs' blood-soaked temples can be unsettling even for a seasoned [class] such as yourself.