Everything is animistic.
Everyone has his or her own unique spiritual path.
Those who can discover and control their own spiritual path and generate spiritual power are called spiritual masters.
Some of these people are dedicated to collecting spiritual objects scattered on the earth and making them into cards.
The first person to make cards called himself a spiritual master. The strange spiritual creatures created in these cards are called possessed spirits.
When He Xun rescued Mu Wendi, he didn't expect what kind of disaster he would bring back.