Junior Sister Yan looked at Ning Cheng in shock. It took her a while to realize that Ning Cheng really didn't know, and then she said that after the flames reach purple, they will consume the top-grade starry sky fire attribute materials before they reach Nirvana and then be upgraded to starry sky flames. Otherwise, there is no way to melt top-grade starry sky materials. Senior brother, you don’t have the Nirvana Flame, how do you refine a middle-grade Taoist weapon?...