Xu Lei’s face alternated between green and white when he saw the glass light circulating around Zhou Yuan’s body. The anger in his eyes almost gushed out because he finally understood that Zhou Yuan had tricked him! 

The tribulation lightning he had formed with his Sacred Pupil had not only failed to injure Zhou Yuan but had also helped strengthen Zhou Yuan’s body to another level!

This guy deliberately concealed himself with the Genesis Qi barrier to make him appear miserable from being struck by tribulation lightning, but he was, in fact, using the lightning’s power to strengthen his body!

Moreover…    

“How dare you use my tribulation lightning...