Almost at the same moment, Yang Yan also felt a slight disturbance beside him, then swung a long knife out.
Ah!
A scream came from the Void that ordinary people could not hear at all, and that presence vanished without a trace.
Yang Yan hurried to Blitz's side and asked with concern:
"Are you okay?"
Blitz gently shook his head:
"I'm fine, that guy attacked me once, but I blocked it. However, it disappeared again in an instant."
As Blitz spoke, he showed Yang Yan his back.
On his back, there were four gashes.
Fortunately, it only slashed his clothes, without leaving any marks on his skin.
"Teacher, what exactly was that thing?"
Blitz was somewhat fearful at this moment.
If his reaction had been a little slower earlier, he might have been successfully killed by the opponent.
"I don't know, I didn't see it either. It was right beside me, but as soon as I attacked, it vanished."
