Soul

His knowledge of Array Alchemy had reached such a profound level that he finally succeeded in creating a branch of pill formula perfectly suited toward Mortal Meridians. 

Thanks to his pioneering a new field, not only did his own cultivation benefit greatly, but those of his mortal world did as well. Though their birth rate was incredibly low, in the last 80 years, Dyon's Mortal Clan had given birth to 100 000 Mortal Warriors. Among them, there were even 3 born with Star Grade Fusion Meridians. 

Aside from his qi cultivation, Dyon's body reached the absolute pinnacle of the Diamond Silk Stage, becoming perfectly aligned with his qi cultivation. Unfortunately, even half immortal grade pills seemed completely unable to allow him the final step in breaking through. 

Still, this disappointment didn't cloud his good mood. There were many other things to be happy about. For example, his soul.