C299 Breakthrough Mutation

At this moment, he was frowning and deep in thought. Occasionally, a smile would appear on his face, as if he was trying to verify the truth of his thoughts.

"..."

Two hours passed just as Zhang Yicheng was carefully placing down the spirit stones.

At that moment, Zhang Yicheng had placed a different amount of spirit stones in every corner of the cave.

Looking at it from afar