C903 Mysterious Black Lines!

The mysterious black line!

"What the hell is this?"

Ye Xing carefully examined it but was unable to identify it. This was not simple. Ye Xing's current knowledge reserves were extremely rich.

"Mo Yang, what is this?" Ye Xing asked in his mind.

"Master, Master has never encountered such a thing before. I don't know what it is either," Mo Yang said, confused.

In the past