Words of Radiance (mentioned), |
Nergaoul is an ancient, evil spren and one with which Taravangian hasn't the resources to tackle. Adrotagia implies that Nergaoul is a Voidspren, or perhaps an Unmade connected somehow with the Thrill.
According to Taravangian, the Thrill only affects people who are in a certain proximity to Nergaoul.
|“||"The Thrill is at least as strong here as it is in Alethkar. Maybe stronger. I will speak to our scholars. Perhaps this will help pinpoint Nergaoul."||”|
–Adrotagia to Taravangian
Nergaoul was known for driving forces into a battle rage, lending them great ferocity. Curiouslay he did this to both sides of a conflict, Voidbringer and human. This seems common of the less self-aware spren.
–From Hessi's Mythica, page 121
I am convinced that Nergaoul is still active on Roshar. The accounts of the Alethi "Thrill" of battle align too well with ancient records - including visions of red mist and dying creatures.
–From Hessi's Mythica, page 140
Brandon has confirmed that the Unmade are Splinters of Odium. Odium splintered himself and created the Unmade to be his influence on Roshar. It is through the Unmade that Odium may be able to influence people in how they think or act.