Welcome, Unknowable! I really like your character and I'm looking forward to meeting him. One of my characters has a connection to Unvaris which we could exploit in the future. Especially if he can literally hear the god. 

Merlin asked me to review your CS so I'll also ask some questions if you don't mind. 

- So my most important question is what exactly does HE think Xerin is about? you don't have to spoil us if you have a plot in mind but he just strikes me as the nice guy and that, along with the fact that Merlin said all of Unvaris' followers are unwilling, leads me to believe that Cleric 17 isn't actually aware of what Unvaris is. In that sense, if he thinks he's spreading the word of an unknown god, what does she tell him to say to the people? 
-  Secondly, about the fire potion, you said it "Explodes when it comes into contact with air.". Is that all it does or can it be used as a coating of some sort to keep fire burning longer etc?

- Under magic, you say he can basically spread plague but does that apply to any disease or just this one? 

- If the nanites can be used to enhance attributes in other people's bodies, can't they do the same for his own? Also (correct me if I'm wrong) if the nanites are what maintain his system (keep him alive?), does it weaken him if he loses too many?