Could it be... a Celestial?
Thinking of this possibility, Mu Changtian's heart was filled with indescribable excitement. If this old man was indeed a Celestial, then Great Wu's two Grandmaster Military Generals would be no threat at all.
The strength of a Celestial was to that of a Grandmaster as heaven is to earth; even ten Grandmasters together might not match up to a Celestial.
However, if North Country had a Celestial, why wouldn't the North Prince let people know? Initially, didn't the North Prince have Zhuge Zhongguang pose as a Celestial simply to intimidate the various dynasties?
If North Country had a Celestial, why would there be a need for Zhuge Zhongguang to impersonate one?
Could it be...
This old man achieved the breakthrough to become a Celestial later on?
Mu Changtian also thought back to when Lu Chen had recently taken the initiative to clarify that Zhuge Zhongguang was not a Celestial.