What should I write at the beginning of a novel?

I want to write a fantasy novel. The protagonist was a supreme martial artist in his previous life. Later on, due to the ruthlessness of the heavens, he embarked on the path of killing the heavens. However, in his previous life, he failed to kill the heavens and was seriously injured. After he went through Nirvana and reincarnated, he lost all his memories of his previous life and his battle strength disappeared without a trace. Only the key to awakening was left behind. In a certain place in a certain life, it was finally awakened and obtained the ultimate combat strength. Once again, it embarked on the journey of conquering the Heavenly Road. I felt that it was a bit like Chen Dong's style, but I really didn't know how to describe it at the beginning. I had an image in my heart, but I didn't know where to start. Ask the gods for help... "Those who obey the heavens prosper, those who defy the heavens perish. "The Heavenly Dao is beneath me. You will soon become the most delicious tonic for me to absorb." At the end of the sky, a majestic voice echoed. With that, the Six Paths shattered. In the human world, the sky and the ground were cracking like glass. The mountains and rivers continued to collapse, and the rivers stopped flowing. A girl cried,"Dad, Mom…" Halfway through his sentence, he was drowned in endless light. Every part was filled with the smell of blood, making one feel nauseous. In the Heaven Realm, countless mountains and rivers were torn apart by the Spiritual Qi that was spreading everywhere. The same thing was happening in hell, evil spirits, Asuras, and beasts. Above the endless sky… "Hmph, Heavenly Dao. What exactly is Heaven and what is Dao? Are you going to wantonly kill all living beings to absorb your nutrients?" A cold snort suddenly sounded. " There's no need to say anything more. Destroy him and re-establish the order of the Six Paths." Another decisive voice sounded. "Beneath the Heavenly Dao is nothing but grass. In my eyes, all living beings are nothing but ants, and you are just powerful ants. You can't do anything to me. Ah..." Then. A World Grinding Disc was released, dragging a meteor-like tail behind it. The space was shattered because of it, and everything it passed by was turned into ashes. It pointed at the group of people below the throne. The Six Paths were already in ruins. The mountains and rivers were destroyed, the rivers dried up, and all living beings were destroyed. The scene after the Six Paths collapsed was a world of darkness. There was no light, no spiritual energy, no life. It became lifeless. I don't know if it's good for me to write this. Please give me your comments.