In fact, the transformation of the Great Sun Thunder Tyrant Body Muscle Marrow Secrets wasn't just limited to the expanding flux points and meridians. In system's words, that was just a variation which had arisen due to the nature of the source power.
After fusing with the tribulation thunder of the origin world, Li Yunmu had rotated it twelve times. At that time, he suddenly discovered that he could casually use the power of a thunder sun.
Previously, it was impossible for him to achieve this feat, but now he just raised his hand toward the sky.
The next instant, strands of energy separated from the thunder sun in his brain and, after passing through the meridians between the seventy-two flux points, it appeared in the hollow of his palm, congealing into a marble-sized energy bead. This energy bead was formed of blazing flame and cyan thunder.