C310 The Gathering Place of the Ghost Aura

As they delved deeper, a surge of spiritual energy enveloped them, growing more intense with each step. This was the aura emanating from the crystal stones. The higher the grade of the Crystal Mines, the richer the spiritual energy they exuded.

Zhou Yan, however, sensed something distinct within the energy. He paused, closed his eyes, and rushed to the stone wall. Channeling Yin-Yang Energy