Flying Sword from Heaven

I am a genius who has never been born in the human world for ten thousand years. I have accumulated my inner essence in ten days, refined the divine sword in one month, risen to the sky in three years, opened my mind to Tongyou in ten years, entered the quiet world in thirty years, ascended Qingming in seventy years and entered Tianyuan, became Taiyi in one hundred and twenty years, and survived the disaster in two hundred years. It only took more than three hundred years for me to ascend to the immortal world. However, on the day when I ascended to the immortal world and enjoyed eternal life, a boundless sword light dropped from the sky and cut me off from the path to immortality. My vitality was severely damaged. I lost my memory and cultivation from then on, and could only wander around the human world in confusion...