But the ability to use the Will stat is not the only thing that he knows makes the Sword Pathway special. He also knows that the Sword Pathway can also use the Mind stat, Body stat, and the Soul stat for power. That makes it a pathway that can use the whole of a cultivator's existence for power.
According to his experience, most pathways are limited to one stat for power, like the Strength Pathway, which is limited to only the Body stat. Since the Sword Pathway can use every stat, it is no wonder that it can produce higher power than the Strength Pathway at the same level.
He knows that the Sword Pathway achieves this feat through the Sword Heart, which helps to unite all of a cultivator's existence with their sword. This is rare, which is why he is further impressed that the Killing Pathway can do this even better than the Sword Pathway.
