A dark secret technique

It was not that Yang Xiao had never come into contact with secret techniques. There were some secret techniques that could allow one to experience a burst of three to four times their usual battle prowess, but all those required you to induce self-harm, or would cause very great aftereffects in your future.

But a boost of battle prowess by 10 times… was too much. There was no secret technique that could accomplish that.

"Brother Si, you're kidding, right?" Yang Xiao asked. If there really existed this kind of secret technique, it would be much, much too awesome.

"Xiao Cheng." Xiao Cheng waved a hand.

Immediately, a youth walked out, and cupped his hands in obeisance towards Xiong Si. "Lord Si!"

Xiong Si nodded, and asked Yang Xiao, "You know of Xiao Cheng, right?"