Transmigrate and Sign In for the Ancient Sacred Body from the Start

I transmigrated into the Qin family of a grand fantasy world, the foremost clan in the Great Qin World. At the moment of my birth, auspicious signs filled the heavens: an Immortal King appeared, a green lotus grew from chaos, and ten thousand swords bowed in reverence. I was born bound to a System, and sign-in rewarded me with the Ancient Desolate Sacred Body. When I was born, the Eighteenth Ancestor named me the Zero Sequence. Sign-in at the ancestral shrine granted me peerless dual pupils; sign-in at the Sword Pool gave me an unparalleled sword heart; sign-in at the Demon-Suppressing Prison awarded me the Divine Elephant Suppressing Prison Strength. With an invincible background, heaven-defying talent, and a sign-in System, my opponents are the Chosen of Destiny, men and women alike. To me, these chosen ones are nothing but leeks waiting to be harvested once they grow fat. Those powerful figures reborn from past lives are walking treasure troves. Every young genius is unworthy even to carry my shoes. I, Qin Zhen, was born to rule the world, make all beneath heaven bow, and reign supreme throughout the ages.