Chapter 186: 181-189

Xinya listened as Rhiannon began to reiterate what the quest summary had already told him. However, he didn't mind hearing the details again, because the quest summary was just that, a summary, and wouldn't give him a real insight into what was going on in the Fae realm. 

From what Rhiannon told him, he learned that before the Unseelie began going against the natural order of things, a strange object fell from the sky. With the description that Rhiannon gave to him, Xinya could tell that it was a meteor of some kind.

Inside of the meteor was a foreign substance that began to seep into the ground. The Unseelie was able to clean it up, but after a couple of days, they began to get sick.