C75 Refining the Divine Crystal

Xue Yin's Gray Air Mass circled around Mu Tian. He had no idea what happened to Mu Tian.

Why did Mu Tian continue to do this even though he was injured? And why did the injured Spiritual Sense continue to increase in strength?

Xue Yin had been living around the Rainbow Light Sphere for the past few years. Every time he got injured