Heiran was indeed powerful. Xue Fanxin used all her abilities but could not gain any advantage. She could not even touch the corner of her clothes. If not for Heiran showing mercy, she would have long been defeated. In a real fight, she would be dead by now.
But the spar revealed her shortcomings. It also stimulated her fighting spirit and the potential in her body, and she could even comprehend new things from battle.
In less than an hour, she had touched the threshold of the Spirit Master Realm and successfully advanced.
"This works?" Heiran was shocked to see that Xue Fanxin actually advanced while fighting.
Breakthroughs were a huge matter for cultivators. If someone destroyed their advancement midway, not only would they fail, but their foundation would also be affected. In serious cases, their meridians might rupture.