I didn't notice they were elemental.
I like the fact that you could guess personalitys from how they look. Also Tuma a evil and powerful leader, as a city on a mountain a 'clone' army and is likely more advanced then the other tribes and Agori having the 'best' life. Sounds very post apoc, I mean a disaster and scavegers and a race turing into beasts and a guy taking advantage of the situation and caravans and all kinds of things make it sound very good. Lets hope Greg can make an incredible story with the backdrop he has made, at least we can make amazing Fan-Fiction with this.