C421 The Demon Emperor Who Participated in the College Entrance Examination

The simplest analogy is, which one of the same size of wood and stone is tougher?

Naturally, the stone was harder because the nature of wood and stone were different.

The role of the Color Change Pill was to transform one's true qi from the fragile wood to the hard stone. It was also true qi, and the power one could unleash was three to five times stronger than before