Finished! I really liked the way you brought everything around to the end. I think the Tattered King sort of wasted a pretty powerful advantage, with those three favors, but I see why it went down that way, particularly after how he contorted his bargain with Narissa. Speaking of her, I was mildly expecting her to put in an appearance at the end, just because all of the other characters were there, but again, I don't think things are any worse off for not having that.
I liked your little nod to the AEther vents in chapter 11, by the way.
The Tattered King is probably my favorite character in this, and more so even than the others, I'll be interested to see what he gets himself into later on. I also find it interesting that while the threat is temporarily defused, Dominia is really no better off, because Dantalion is still out there, and the Annulus still exists and is functional. So really, this can reset at almost any given time.
So yeah, I really liked this piece as a whole. Good work! Several new, interesting characters are floating around, and we got to see another look at some of the Cabal, of whom I am particularly fond.
Thanks, Tevish!