C55 Start Refining

"Mr Ye, can you give me this stone?" Yang Pann looked at Ye Zhentian and asked. There was no need to explain about demon cores, as long as they could be obtained it would be enough.

"Young Master Yang, this black crystal doesn't seem to have any value. Why do you want this stone?" Ye Zhentian said as he frowned.

"No need!"

Yang Pann laughed: "This thing may be useless to you, but to me