Originally, there were only divine power and magic in the three realms. The three realms have coexisted peacefully for 5 million years. However, the divine realm has become increasingly corrupt, and slaves have emerged who want to occupy the human realm and turn it into tribute incense. They oppress and torture. Some people are unwilling to rise up and resist, and have independently practiced an attack method - internal force.
Concept: I'm bored and can't write well.