Fantasy: I Use the Devil's Fetus to Swallow the Way of Heaven!

[No system] + [Magic repair] + [Counterattack] One hundred thousand years ago, the Celestial Clan became very ambitious, suppressed the Heaven-Swallowing Demon Clan, privately merged with the Way of Heaven, and controlled the destiny of the people. One hundred thousand years later, Lu Ning, the son of a sinner of the Qinghe Sect, was poisoned by his fellow sect. When he was about to die, he was selected by the Sky-Swallowing Demon Clan and awakened the Nether Demon Fetus—— Devour spiritual power and souls, cultivate one's own strength by leaps and bounds, and eliminate injustice in the world. But he led the thunder from the sky to kill the demon. On the way to escape, he was accompanied by the cold goddess Su Nanyin, but he didn't know that she had the body of a mysterious female pure spirit, who could destroy all demons with a single thought, and collapse mountains and rivers with a single thought. "Demons are not always evil, people are not always good, and the ways of heaven are unfair. Why don't you join hands with me to defeat the heavens?" Since then, the fallen demon boy and the god-killing girl have traveled through three realms: Enter the deserted sea and collect the ghost army as your blade; ascend to the Heavenly Palace and use the Mirror of Reincarnation to shatter the eternal conspiracy; fight the Demonic Abyss and lead a hundred thousand demons to rewrite the fate of the people! If God doesn't allow me, Lu Ning, then I will fall into the devil and destroy this dog's way of heaven! … Look at me, the Sky-Swallowing Demon Lord, Lord Shura—— Swing the ax of annihilation to destroy the sky and destroy the way of heaven. Spread raw jade liquid and innovate the world!