C697 Black water overage

"Everyone, come with me." Li Ju Xiang walked to the side of the black tower and gestured, "Saw off the tip of this Purple Obsidian Stone. It should be able to enter …"

"This is a purple gold obsidian stone, it cannot be broken by fire, it cannot be broken by iron, and it cannot be pierced by knives. How do I open it?" Ba Jie did not understand.

"Obsidian is also a stone, I have an idea