Heaven defying Divine Sword

"Immortal Emperor, isn't it time to put an end to this? It's about time the grudges between the realms of immortals and demons are settled," a figure shrouded in black mist spoke. Suddenly, a group of figures appeared around them, and the previous shadow remarked, "Alright, so many people have come. Quite a spectacle! Immortal Emperor, just give the order already, stop dilly-dallying!" With that, at an astonishing speed, he charged towards the crowd. The Immortal Emperor shouted, "Demon Sovereign, you have no shame, resorting to ambush!" The Immortal Emperor then hurled a golden sphere towards the direction where the Demon Sovereign was attacking. As the Demon Sovereign was about to collide with the golden sphere, he bellowed, "Witness my 'Mysterious Yin Devil Art', heh, your 'Sun Heart Sutra' is nothing special." The two different-colored spheres in the air finally collided. The Immortal Emperor quickly retreated, and the Demon Sovereign laughed, "Immortal Emperor, don't think you can escape. The 'Darkness Devouring True Qi' has entered your body, you won't survive." Just as the Immortal Emperor was retreating, his figure suddenly flashed and appeared in front of the Demon Sovereign. Swiftly, he thrust out a palm, and a white light shot towards the Demon Sovereign. The Demon Sovereign sneered and charged towards the white light. Other immortals witnessing this exclaimed, "Emperor, be careful!" The Demon Sovereign chuckled, "Heh, too late!" He circled his palms, and the white light disappeared into his palm. From his palm emerged a bright purple light, as thin as a needle, swiftly piercing into the Immortal Emperor's vital acupoint. The Immortal Emperor's body seemed to be electrocuted, and the armor on his body tore apart. Seeing this, other immortals rushed in. Four of them attacked the Demon Sovereign, while three surrounded the Immortal Emperor, shielding his true essence with their own. One of the immortals attacking the Demon Sovereign exclaimed, "Demon Sovereign, you've actually learned the first half of the 'Sun Heart Sutra'. Today, we must eliminate you for everlasting peace in the realms!" They combined their powers, creating a grey dragon from the fusion of their different-colored immortal qi, which breathed red flames towards the Demon Sovereign. The Demon Sovereign's expression changed, "So this is your 'Natural Qi of Wind, Rain, Thunder, and Lightning'! Impressive!" Closing his eyes, the Demon Sovereign muttered an incantation, surrounded by a black qi. Gradually, he disappeared, while the dragon bit into the qi. Strangely, the dragon's mouth began to evaporate, while the black qi expanded rapidly, absorbing immense energy. Seeing this, the immortals were horrified. The Immortal Emperor, who was protecting himself, looked on, realizing the severity of the situation. The Demon Sovereign also started to invoke magic. The Immortal Emperor closed his eyes, his body hovering and rotating. The Demon Sovereign did the same. Suddenly, a golden and a black sphere continuously rotated in the air, gradually turning their bodies into emptiness. The other immortals realized that the two had pushed their powers to the limit, and an unprecedented battle was about to erupt. Without warning, the two spheres collided rapidly, as if blasting open space. The immortals suddenly lost their sense of time and space, scrambling to maintain the normal functioning of the world. After a while, the spheres disappeared, revealing the Immortal Emperor and the Demon Sovereign standing motionless. The scene was silent, with no sound. The Wind Immortal was the first to react, exclaiming, "Could it be? Did the Immortal Lord and the Demon Sovereign perish together?" This statement made others realize the situation. The Thunder Immortal shouted, "This is bad, we need to leave!" However, the others did not move. The Rain Immortal said, "No need, it's too late. The apocalypse has begun!" The Immortal Emperor and the Demon Sovereign suddenly burst into laughter simultaneously. With a loud bang, the space seemed to tear apart, and their bodies exploded. The other immortals closed their eyes. In just a moment, the entire space vanished, and life on Earth disappeared due to this war. After the space vanished, there was no concept of time or space. A while after the great war between immortals and demons, an old man appeared. Looking at the 'Otherworld' without time or space, he shook his head and muttered, "Why bother! This is unacceptable. I have to fix this mess personally. I warned them not to fight, but they insisted on creating chaos and experiencing the taste of complete destruction." After murmuring a spell, everything in the world returned to its original state. The old man looked at everything before him and chuckled, "Not bad, it should be fine now. But in the future, they can't use immortal or demonic magic anymore!" Then, he muttered a few more words and, surprisingly, two figures slowly appeared in the space, the Immortal Emperor and the Demon Sovereign who had disappeared earlier. Seeing the old man, the two walked up to him, bowing their heads silently. The old man said, "I told you not to fight. If I hadn't arrived today, the crimes you committed against the universe would have condemned you to eternal damnation." The Immortal Emperor blushed and said, "Lord God, the Demon Sovereign has gone too far. I only wanted him to reflect on his actions, but he continued to let his subordinates cause trouble. That's why I had to show him the power of righteousness." "Enough, enough, don't say anymore. I know about your affairs. Alright, from now on, I will establish a 'Divine Edict' with you. Anyone who violates this Divine Edict will face divine punishment, life or death will depend on their cultivation." The old man interrupted the Immortal Emperor. After some thought, the Demon Sovereign asked, "Lord God, what kind of Divine Edict is it exactly? Please tell us!" "Alright, listen carefully. I'll give you both a chance to reincarnate, but you can only live in the ordinary martial world of the common people, without using magic or immortal techniques. Understand?" The old man glanced at the two with a stern gaze. After a moment of contemplation, both the Immortal Emperor and the Demon Sovereign spoke, "Alright, we can do that!" The old man smiled, "Very well, I will make sure that those immortals and demon lords also reincarnate. Now, go!" The two exchanged a glance and then left. The old man watched their departing figures and muttered to himself, "I have to send someone to supervise them, so I don't have to worry! Hmm! I really don't know how this will end. In the end, there will still be a great war between immortals and demons. I wonder if the apocalypse in this martial world will pass more peacefully!" With that, the old man disappeared from the space.