C899 Refining Pills in All Colors

In the past when Ling Feng was in Immortal World, he never needed to use the furnace to refine his face. He only used the Origin Flame to refine it directly, and the alchemy skills in Immortal World were very advanced, not something any cultivator on Earth could master!

They had to use the furnace to control their spiritual energy in order to create the highest quality pill. And this time