Yuanshin: The Nine Systems of the Human Body, Unlimited Possibilities

Creatures are mysterious and magical, and everyone has nine systems.
Motor system, digestive system, respiratory system, immune system, nervous system, circulatory system...
These sophisticated systems are unassuming, but very powerful.
After crossing Tivat, Jiang Yi's nine major systems mutated, becoming stronger all the time, and continued to evolve due to external stimuli.
Wolf King: "You are the first mortal to pass my test!"
Wendy: "I will tell your story to the Seven Kingdoms."
Zhong Li: "The body of a mortal is comparable to a god!"
General Lei Dian: "His sword cuts mountains and seas, and shatters thunder."