Ok, I was going to have Xerin just be a local version of one of the gods, but with a bit of a cult following.  I was thinking Unvaris (who seems to be the god of suffering, which is why I hinted at that in the "other" section), but being a necromancer in my former life would work too.  I guess we could say that they were doing it in secret (only 17 clerics and they changed their name) for some reason.  Maybe the high priest was a Lich that was working for Yishreenok and I didn't know it?

If that's the case, could I develop the power to raise the recently dead back to life at some point?  An actual resurrection, but only within an hour of their death?  I wouldn't know of this power, though, but some of the other clerics of Xerin would already have it or a variant (like creating Second Lived).

I'll change things tomorrow to explain the limits of his nanites and enchantments.