C750 What the Hell Is Going on

After stepping into the Lightning Sea Boundary Stone, Ning Xiao suddenly felt that this place was different from the outside world. A wave of Spiritual Force that made one's entire body go numb gushed into his body, causing him to involuntarily shiver. Then, he felt the Thunder Source in his body start to come alive.

The activity of the Thunder Source was within Ning Xiao's expectations. However