Gu Nian remained cool and detached, as if the stares around him had nothing to do with him. 

"Lu Changsheng, don't let their stares bother you. This is just a spar between the two of us—winning or losing is beside the point," he said, calm and composed. "And if things turn dangerous in the arena, you'll be sent out immediately, so you won't suffer any serious harm. That said, if you can't hold against my mental secret technique, you must call for a stop. Even minor damage to the mind can lead to serious consequences."

Lu Changsheng nodded. He had not expected Gu Nian to be so considerate, but he wouldn't step onto the arena if he weren't prepared.

"Very well. Let's begin," Gu Nian said. 

Without wasting another breath, Lu Changsheng launched his attack. "Heart Sword!" 

A faint buzz rang out. Then, from within his Mind Space, the Golden Heart...