Refining Hall was the location Xuan Gate people use to refine things. There were a few things necessary to refine for Xuan teachers. The first thing was a perfect refining soul pet. 

Ye Qingzi’s Ardent Yang Pupil was a refining soul pet. Whether one could make an immortal rank item highly depended on the refining soul pet.

The second thing required for refining was a furnace. A good furnace could control the flame better, improving the chances and quality of the refining.

The Immortal Ghost Stone that Ye Qingzi gave Chu Mu wasn’t very high quality. If he used it on Ghost Monarch King directly, the chances of failure were very high. Instead, Chu Mu gave it to Ning Maner to nurture.

When the quality was perfect, he could have a surefire way of getting a rock type immortal rank. Ye Qingzi always said Ning Maner was the best furnace that one could ask for.

If Xuan Gate also knew Ning Maner had this ability, they might immediately rip up this Refining Hall that they had for many thousand years and...