C451 Taunt!

What made Old Master Xiao even more terrified was that he didn't even see any trace of Tian Yu using his Qi and force when he was attacking just now.

Any martial artist who used their Qi and force to attack would have traces to follow, but Old Master Xiao couldn't see any trace of it on Tian Yu's body. This was too scary.

In Old Master Xiao's opinion