Use words as symbols, use words as means of attack, use words to connect yin and yang, and use words as rules.
Using ancient words as the foundation, ancient wisdom as an aid, and using words as an introduction, we can connect yin and yang and destroy monsters.
The two realms of yin and yang are out of balance, and ghosts and monsters are causing cholera in the world. Unfortunately, the ancient power sealed the connection between the two realms with words, but now that the seal has failed, ghosts and cholera have returned to the world. The nine aristocratic families re-entered the world and came to slay demons.
Use words to transform weapons or connect yin and yang, and use the power of the five elements to destroy demons or seal ghosts.