For the Glory of Rome: Chronicles of an Isekai'd Legion - Chapter 23B3 : One Last Charge

Betrayed and left for dead, Richard Blackwood—formerly known as the world renowned hero Astralis—awakens a decade later to find the world has moved on, and an imposter now wears his mantle. Disguised as a rookie in the Mage Guild, he quietly hunts for answers.'If my little sister is levelled above me, then what about everyone else? How much stronger have the bastards who betrayed me grown while I was dead?'Richard must grow stronger once again, and rise much higher than the S-Rank.'What the fuck? I almost die, and I get a power up?'Not harem.

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.

A good-for-nothing man married a beautiful girl but was kicked off the bed on the wedding night. Furiously, he wrote a bill of divorce and ran away.
He was schemed a car accident in which he nearly lost his life. However, it turned out to be a blessing. He swallowed the soul that passed through the outer world, thus obtained superb medical skills and martial arts.
Later on, with the silver needles and invincible martial arts, he embarked on the road of counterattacks and was committed to his great dreams.

- Description from Novelupdates