```
Hiss... Hiss... Hiss...
From the shattered window, a wisp of black Qi emerged.
It moved quickly and vanished into Bai Xiao's body in an instant.
He froze on the spot for a moment.
Looking down, on the back of his right hand, just above the Skull Mark, a black line slowly appeared. The line was fine, like a slender, sharp sword.
"What does this mean?"
Bai Xiao furrowed his brows, his attention drawn to it as he pondered.
Boom!!!
In an instant, a window of building number two shattered explosively behind him.
A burly figure swiftly fell from it.
Clutching dual blades, he viciously swung them at Bai Xiao's back!
Thud!
The burly figure was sent flying backward in an instant.
The dual blades in his hands also snapped from the forceful blow and were flung away.