Spiritual energy is the most important thing in this world. Everything is measured based on one's spiritual energy.
When one offers a mid-grade spiritual herb that possesses such great efficacy to another person, isn't it easy to control the other person according to one's wishes?
Xiao An Na understood that the people of this world would do anything to increase their spiritual power.
With spiritual power, one will get anything, freedom, honor, wealth, popularity, and other things.
Everyone wants the same thing, and everyone is moving toward one point, which is to reach the highest level of spiritual power.
Master Yui scanned the expressions of everyone in the carriage then said again, "If something as extraordinary as this were abused by some person or group, what do you think would happen? In this world there is competition everywhere, everyone is competing to gain great power and reach the highest position in this world."