The Yin-Yang Guardian's Command

A great calamity in ancient times caused the five great clans and countless races to vanish, lost in the endless river of time. After the Demon Emperor schemed to send Zhang Yan back to antiquity through transmigration, he rewrote the historical record and brought back the glories of the ancient past. The righteous path would endure for generations, but countless life-and-death crises awaited him along the way. Can Zhang Yan, with his divine body, demonic soul, and demon blood, defy fate and reach the pinnacle of martial arts?