Although Profound Light Crystal Stones were merely auxiliary materials in cultivating the secret arts of the Profound Nether True Explanation, they played much the same role as spirit stones during a cultivator's cultivation.
However, they were needed in quantity. Given Qin Fengming's experience, it naturally would not be a small amount. It might even be an astronomical number.
What he saw before him now was simply far too little. It would not aid his cultivation of the Profound Nether True Explanation in the slightest.
Seeing Qin Fengming regain his composure, Zhang Zhe's expression flickered repeatedly as well.
"Fellow Daoist is absolutely right. But if I only had this one piece, I naturally would not have invited you to my cave abode to discuss anything."
Qin Fengming had only just steadied his state of mind when he heard Zhang Zhe's words, and it began to fluctuate again.
"Are you saying that you have many more Profound Light Crystal Stones like this?"
"Profound Light Crystal Stones are special materials containing vast and strange light waves. Although I have never heard of any magic treasure that can use them, they can help cultivators cultivate certain powerful secret arts, such as the Illusory Mind-Bewildering Light and the Profound Nether Divine Light. Even continuously tempering one's life-bound magic treasure with this kind of crystal can make the condensed light of the life-bound item tougher and sharper. Therefore, this item definitely counts as an extremely precious treasure."
Zhang Zhe did not answer Qin Fengming's question. Instead, he launched into an endless explanation of Profound Light Crystal Stones.
This made Qin Fengming want to interrupt him. He already knew all about this material and had no need to hear the other man's explanation.
Out of courtesy, Qin Fengming did not speak and listened quietly to Zhang Zhe.