Exarch Onaala wants you to go to the ruins of Karabor and slay Alandien, Theras, Netharel and Varedis.  Use the Book of Fel Names when Varedis uses Metamorphosis to weaken him.  Return to Exarch Onaala with the Book of Fel Names after you've completed this task.$B$BCompleting quests for the Aldor will cause your Scryers reputation to decrease.