Legend of Gods and Demons: the Beginning of Heaven

According to legend, when the sky cracked, Nuwa exhausted all her energy to mend the sky, and the Emperor of the Demon Realm led an army to break into the world through the cracks in the sky. Nuwa tried her best to seal the Demon Emperor and no longer had the energy to fight against the Demon Army. Before she died, she dispersed her divine power into some individuals of the species she created, "humanity," to enable them to fight against the demonic army. They have been fighting for thousands of years, but there has never been a winner. At this time, the soul of Nuwa, who had exhausted her divine power, and the soul of the Demon Emperor, who had sealed his magic power, were reincarnated into the world as ordinary human souls...