"It appears the screams of Sai's phantom have brought forth another burden for me to bear—the phantom of Vell Tarlowe."
As the Nightmare of Omnigul swept through camp, Eris noticed a strange reaction from the Essence of Despair. Upon further investigation, it appears the Essence can be of use in fighting these Nightmares. But first, it must be cleansed of any dark energy.
Take the Essence of Despair and purify it any way you can. Then, return to Eris Morn.