It is a quest in the Ebonheart Pact region of Stonefalls.
Overview
I've learned all I can at Othrenis. Onuja says that Balreth is somewhere near Ash Mountain. Garyn Indoril has led many Pact soldiers there with hopes of containing tve Brother of Strife. I must travel to Ash Mountain and find Garyn Indoril. I need to tell him what I've learned about the methods used to imprison the Brothers of Strife.
Quick walkthrough
Walkthrough
Reward