Hey,
I got the setting book, and it seems very interesting.
I noticed you said that you got some inspiration from the movie The Prophecy.
I know there is a Zao song on the Where Fire and Blood Bring Rest cd that has a clip from the movie The Prophecy in it at the beginning.
This isn't all the way accurate, just what I can remember:
"I stood with my brothers, and watched the sky burn. I saw the faces of angels, destroyed, and the creation fell. I stood with my brothers, but now, my brothers weren't brothers."
I can't remember the name of the song off hand, but I should be able to find it later.