Divine art.
Divine art are when humans copy the flow of beast divine energy into there own and add in a bit of marcial arts! to preform a divine art you need to carefully breath in a rythem and control your divine energy in a certain flow. Usually people can only learn 1-2 divine art, but you know our MC is gonna get 5!
Mcs divine arts
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Universe Blood - changes the blood of any humans blood to green, increases physical body, such as in speed, strength, and much more. the only thing is that learning this will disable the user to use beast artifacts.