C80 Soul Gu

Xing Yun gazed thoughtfully at the end of the passageway outside the Voidlands. After a moment, he conjectured, "There's a good chance that deeper within this mine, there are veins of middle-grade Blackcrystal Mine!"

"Middle-grade Blackcrystal!" The Voidling exclaimed, its eyes greedily fixed on the tunnel's end. "Master, how did you come to that conclusion?"

Xing Yun elaborated