To be honest, although the initial and fundamental purpose of sparring with Gu Qingqing was to help her remove her inner demons and reconcile the master-disciple relationship between Gu Ziying and Gu Qingqing, Xiao Lin felt that he gained a lot from this sparring session.

First, in terms of combat experience, not only did he exchange moves with a Lower Core Formation Realm expert, but he also put the "Gale Sword" into practice. Most importantly, he managed to execute the Lightning Strike of the Ultimate Invincible World-Dominating Thunder Sword.

It's worth noting that despite being struck by lightning for several days, Xiao Lin hadn't learned a thing. Now, he could suddenly use it, which was indeed a great joy.

However, as the saying goes, everything has two sides. This joyful event also brought many new confusions for Xiao Lin—how did he manage to use the Lightning Strike of the Ultimate Invincible World-Dominating Thunder Sword? The masked man had only demonstrated it once and hadn't even officially started teaching the sword technique. Moreover, during the execution of the sword technique, the unusual movement of the Kui Ox Mark and its mysterious connection with the "Beat Up Anyone Who Disagrees" mental technique...