Once again, great work, Vilpich. It is too close thematically to orcs and hobgoblins for my taste, but still, very interesting!
Minor nitpick:
After all, is it "Narzal" or "Narzul"?
I'm trying to decide....
As for the thematic similarities to orcs and hobgoblins, my concept was pretty much orc+hobgoblin+Rome=Narzu since this was intended to replace the orc in the Daemon's Seal campaign setting.