Is This Legend Too Mysterious?

On a continent, there is no magic here, only powerful physical skills and all kinds of strange secret skills. After thousands of years of popularization, all people have become martial arts. Various physical skills are also inherited and roughly divided into factions. After the Martial God Era, the secret skills gradually faded out of people's sight, as if they had never appeared... Thousands of years after the Martial God Era, a legend has slowly entered people's hearts in this era... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.