Comments of chapter undefined of Bro, I'm not an Undead!

The thing about Jerthrax is that even though he should qualify as a beast, he progresses the same way humans progress (it's mentioned in the battle across Null Remnants). That's why he has Classes and Blessing and all. However, Stages essentially don't matter to him because he uses Divine energy and can create Rules. The combination of his Herald powers and natural strength puts him at the peak, but of course, as far as dragons go, he was pretty young, as Sause said.