Restart the Dark Age

Thousands of years ago, darkness revived, and countless dark creatures descended from the night. When the darkness revived, he once saved a little girl, who later became famous throughout the ages and was called the Empress of the Nine Heavens. When the darkness came, he once planted a small sapling. Later, it withstood the darkness and was called the World Tree. He once embarked on a journey alone when darkness fell, leaving traces of marks in the place known as the "forbidden zone of life". The era after his departure is known as the Dark Age.