Kapitel 670: The Furious Qin Yu!

The material used in this prison wasn't Black Gold Stone, but a true rock that was even harder than Black Gold Stone!

This material could be called a true treasure of nature, and its hardness was far above that of Black Gold Stone.

Apart from this, Qin Yu also learned that Martial Saint weapons were hung around this prison.

Therefore, it wasn't so easy to forcefully save people.

"If we can only resurrect the two male corpses, there shouldn't be a problem," Qin Yu thought to himself.

"Oh right, do you see that big door?" At this moment, someone beside him asked.

Qin Yu followed his gaze and nodded. "Yes, I've heard that the people locked inside that big door are even more powerful people." 

"That's right. It's said that the people locked inside are either Martial Saints or people close to Martial Saints." 

Upon hearing these words, Qin Yu's eyes immediately widened.