Imperial Saint Sovereign - Chapter C689

As a promise, he went out into the world as an assassin. 3 years later, after becoming the Supreme Assassin, he gave up on everything he had and returned to the ranks of ordinary people. But one day, Kismet, a mystical game created by the National Research and Development had appeared.

Enigmatic hands, spectral frame, and one cunning strike just like the swing of the Grim Reaper. The Supreme Assassin takes on the mystical world, and how his legendary tales sets off, progressively ascending the altar to becoming the best.

- Description from Novelupdates

There once upon-a-time roamed a boy.The boy went from a baby to a toddler. Then from a toddler to a child. Then a child to a boy. Then from a boy to a man. But, no matter how old he grew, no matter how much time passed, he kept on pondering and pondering, if people reflected on their existence, then what did existence reflect on?No matter if he was crawling on all fours with pacifier, drawing a red house on a green hill with a painting brush, fishing for big and small fishies in his small, little boat, skinning a deer he had caught, or even sleeping, the question persisted.No matter how much he thought about it, he couldn't reach the answer.He became a tutor, a teacher, a killer, a hacker, a criminal, until there was once thing he still did not become.A God.Being subjected to a heavily traumatizing event, Amon now wakes up to only to find himself in a game called 'The Adventure of the Hero: IX' he had once played a long time ago, where he finds a world filled with swords and magic, a magical academy, demons, high-ranked devils, dragons, and advanced technologyFollow the story of Amon, the eighth mechanism of the universe, as he navigates through worlds, universes, multiverses, and the omniverse. gathering the rest of the eight mechanisms, fighting against ancient and outer gods, becoming a tutor of a certain, little daughter-of-a-demon-king, put on a witch hunt of eldricht cosmic horror entities, attending an academy with the protagonist, heroines, villains, villainesses, and even a transmigrated third-rate final boss, meeting witches, creating sects, meeting the 9 goddesses, going against both Orthodox and Unorthodox churches, and many more!This is the story of a boy that had nothing, the story of the boy who knew the price of zer0, the legend of the boy known as 'The Happy'.The Boy who had a broken God Complex----------------------WARNING: This novel delves into themes of madness, insanity, and distorted realities. As the story progresses, it may change your perception and evoke unsettling emotions. Reader discretion is advised. Take care to recognize when to step back if you feel overwhelmed.

I, Zatiel, Abyssal Lord, Ruler of Death and Destruction, Nightmare of Dys, have AWOKEN!!!!!.

His life contains events that can shake the universe:
-Fighting against Tiamat, Creator of Evil Dragonkind, in the first circle of hell, while billions of demons and devils butcher each other beneath them
-Start a World War against the Heavenly Race, and transform himself into a Golden Sun while he slaughters their greatest warriors, the Archangel.
-Enter the Final Gate and fight against the Outer Gods.
-Tearing the nine levels of Baator during his battles against the Prince of Evil, Asmodeus.

With his memories as a ruler of the Abyss and a Universal Existence, Zatiel will rise again.

Long Fei, a cross-timer and doujin, is an otaku who traveled to another world. In the original world, he was an otaku fan of Gundam and military science fiction.

He died in an accident and was reincarnated into another world. The Gundam works he had read before his death and the techniques in various military novels could be brought to another world.

How would he use the Gundam that Long Fei created? What waves can be caused in this different world?

- Description from novelbuddy