Chapter 257: Innate Yuan dan

Above Supreme-grade primordial stones, there was another kind of Qi of vitality. It was like a stone, but not a stone. It was completely condensed from the purest Qi of vitality in the world. However, if it was swallowed directly, there would be no impurities, and there would not even be any reliance. In this state, there was only one in ten thousand Yuan Qi stones. They were born from the essence of Supreme-grade Yuan stones and were known as innate Yuan dan!

is he trying to break through to the primordial core?!