C666 The Thunder Ancestor Had Become a Heavenly Sovereign

There was only Ling Tian and Lightning Old Ancestor in Saint Essence Realm. After so many years, both of them had been cultivating hard. Lightning Old Ancestor's unusual behavior had awakened Ling Tian, who was cultivating. He couldn't believe that Lightning Old Ancestor could advance to the Heavenly Sovereign realm so quickly. It seemed like this matter was closely related to his master