Was there a novel where the protagonist had an infinite system and two avatars, Ancient and Calamity, and could cultivate on his own? Then, the universe where the protagonist lived would self-destruct and split into a Yin and Yang universe?

This book was called "The Unlimited Choice of the Gods of the World." The characters in the book included the male protagonist, Su Yuan, the female protagonist, Sylve, and the female protagonist, the Goddess of Light. This book can be read on Qidian Chinese website. "The Infinite Choice of the Gods of the World" by the author, Kingdom of Bamboo Leaves. It was an infinite/infinite novel with transmigration, system flow, and all kinds of elements. [User recommendation: Transmigrate to a world where all the people are gods, create a God's Domain, and obtain the [Unlimited Choice] system.] [Event: The desperate elf priest sacrificed himself.] [Choice 1: Accept the sacrifice and obtain a pious elf priest and 100 bloodline advancement cards.] [Choice 2: Refuse the sacrifice, give up the elf race, give one orc tribe (you can choose your race), and give 100 bloodline advancement cards.] Sacrifice the Dark Elf Princess and choose the Legendary Fallen Angel. He fused the ancient elven tree with the Sun Tree Heart and chose the Mythical-level Elven Divine Tree. …… After making his choice again and again, Su Yuan realized that he had become the ruler of the Divine Realm, and breaking through the entire crystal wall system seemed to be an easy task. I hope you will like this book.

There were a few novels where the main character fused with the universe that could be recommended. The first was " Under Deep Space." This interstellar science fiction novel told the story of the protagonist and the spaceship becoming one and evolving in the universe. In addition," Universe Overlord, Beginning Fusion of Krypton Bloodline " was also a science fiction novel. The protagonist fused with the Krypton Bloodline in the universe overlord's world and began an adventure of universe expansion. In addition," My Cultivation Method Can Unlimited Fusion and Evolution " was also a fantasy novel. The main character, Xu Ning, fused with a spaceship and continued to evolve. These novels all had interesting plots and settings, suitable for readers who liked cosmic topics.

Martial Yin Yang and Sword Comes were fantasy novels in which the main character had two avatars. In "Martial Yin Yang", the main character, Lin Dong, possessed the ability to split himself. He could split himself into two to train and explore different training paths. And in Sword Comes, the main character Xin Huo also had the ability to create clones, which allowed him to cultivate all kinds of martial arts and spells independently. These two novels were both popular fantasy works and were worth reading.

Saint Seiya's Heavenly Realm and Naruto's Beginning to Break Through the Heavens were two novels in which the protagonist cultivated his internal universe. In " Saint Seiya's Heavenly Chapter," the protagonists fought by exploding their small universes. In Naruto, the protagonist had the light of the small universe to break through the dimensional wall to explore.

From the search results provided, there was no mention of dark novels where the protagonist invaded the universe. I don't know the answer to this question.

This type of novel was often called cosmic science fiction or interstellar science fiction. The plot of the protagonist obtaining alien technology after rebirth was one of the common scenes. Here are some cosmic science fiction novels that might fit your requirements: 1. The Galaxy Empire series, Asimoff. This was a famous science fiction series that told the story of the rise and fall of a galactic empire. The protagonist obtained superpowers through rebirth and led his country to the universe to compete with other countries. 2. The Three-Body Problem series. In this novel, the protagonist became a powerful scientist by obtaining alien technology and led his country to the hegemony of the universe with other countries. 3. The Wandering Earth series. In this novel, the protagonist led mankind to the hegemony of the universe and other countries by building the engine of the earth. 4. Star Trek Series·A. Lambert. In this novel, the main character became an interstellar navigator and led his country towards the hegemony of the universe with other countries. 5. Legend of Galaxy Heroes series. In this novel, the protagonist became a powerful politician and military strategist through obtaining alien technology and led his country to the hegemony of the universe with other countries.

This book was called " The Collapse of the Heavens." The characters in it included the male protagonist, Loki, who had a strange imagination and strange behavior. Female Lead-System, Everything is a tool, I am the protagonist…This book can be read on Qidian Chinese website. " Records of the Collapse of the Heavens " Author: Old Eagle Who Loves Diving. This is a novel about the infinite heavens. It has a systematic style, no moral integrity, clear thinking, big brain holes, and elements of the heavens. It's finished and can be enjoyed without worry. [User recommendation: Wearing Emperor Armor and carrying a Sunfire Cloak on his shoulder.] Doomsday Blade in his left hand and Celestial Slaying Sword in his right. He looked down on life and death, and if he was not convinced, he would fight. The long road is long, only cheap company. " What does the Emperor of Heaven and Earth do?" Luo Qi said disdainfully." What does the Emperor of Heaven and Earth do have to do with me, the Great Demon King?" I hope you will like this book.

"Wu Qiong's Soul" was a fantasy novel that met the requirements. It described a world where martial arts were revered. Everyone had a martial soul in their body, and only the protagonist could cultivate a spiritual object born from heaven and earth, the martial soul. At the same time, it added elements such as pets, mounts, and beautiful women. It was a very interesting novel. I hope you like this fairy's recommendation. Muah ~😗

I recommend "Jin Yong's Unique Skills Run Wild" to you. It's a fantasy novel about a different continent. The protagonist transmigrated to the Primordial Human Tribe and was conferred the title of the Lord of the Human Tribe by Goddess Nvywa. While cultivating Jin Yong's Unique Skills, he established a supreme sect and led the Human Tribe to the position of the Lord of Heaven and Earth, becoming the ruler of the Untainted Land. I hope you like this fairy's recommendation. Muah ~😗

This book was called "The Universe of Film and Television from Hong Kong." The characters in the book included the male protagonist, Lu Li, the female protagonist, BOBOO,"Supreme," the female protagonist, Shan Ying,"One Man's Wulin," the female protagonist, Xi Mengsi,"The Tiger Comes 2," and the female protagonist, Ye Lili,"Descendants of the Dragon." This book can be read on Qidian Chinese website. "The Heavens of Film and Television, Starting from Hong Kong Comprehensive." Author: Desire and Frosty White, is a novel of the infinite/infinite universe. It has infinite flow, no moral integrity, intelligence online, decisive killing, and the elements of the universe. [User recommendation: Lu Li traveled through the worlds and arrived at the Hong Kong World for the first time. He found out that he was the nephew of Zhou Feihong.] "Uncle, if you don't let your son come to Hong Kong, I'm going to wipe out the evil camp!" "Do you think the police are that powerful?" "Oh, things are a little complicated…" Hong Kong, Wuxia, Spiritual Fantasy, Immortal Cultivation…Lu Li carefully managed every world he passed by. I hope you will like this book.