Unlike Sound Art Qi Control, which worked directly on oneself and could be practiced alone.
Sound Art Qi Transformation was intended to weaken the power of an opponent's true qi.
Practicing alone was not enough, because he would have no way of knowing just how powerful his Sound Art Qi Transformation was or how much it had weakened his opponent's true qi.
He had Wu Cang and the others select some disciples of differing strengths to serve as his sparring partners.
But to Huang Xiao's frustration, none of these disciples could last long, and they all suffered severe injuries.
"They're a little too weak," Huang Xiao sighed.
"Hall Master, you still have us!" Wu Cang called out.
By that, he naturally meant himself, Yin Huju, and Liu Jiong.
They were the strongest people in the Heavenly Demon Hall below the Heavenly Demon Hall Master.
"You still have to manage all the affairs of the Heavenly Demon Hall. How could I have you attempt something like this?" Huang Xiao said gravely. "I've already thought of the most suitable sparring partner."
The eyes of Wu Cang and the other two suddenly lit up. One person had occurred to them.
"Fan Liya?" Wu Cang asked.
"Exactly. An expert like him shouldn't be gravely wounded by me, should he?" Huang Xiao laughed.
"That would be ill-advised. Who knows what tricks those old fellows have? You might be in danger if you went there, Hall Master," Liu Jiong said.
Fan Liya had now been subdued by Shi Hen, and breaking free was clearly not very likely.
But he feared that something unexpected might happen to Huang Xiao, which would be bad.
"Yes, yes, yes. We can't be careless," Yin Huju said as well.
"That is indeed something we must guard against. There's another problem, too.