Although that immortal sword had lost a great deal of its power over the endless years, the profound laws and mysteries of Yin and Yang contained within its surviving energy remained unchanged.
Perhaps it could not directly elevate Ye Xiaoyao's cultivation level, but by meditating on the laws and mysteries of Yin and Yang within it, Ye Xiaoyao gained an entirely new perspective.
After all, this was a primordial Yin-Yang stone formed at the very beginning of heaven and earth, and its laws and mysteries were the root of all Yin and Yang forces in the world.
Chapter 777