Starting as a Son-in-law to Establish an immortal Family - Chapter 1361 - 468: Slow Starter? Lu Ancestor Doesn’t Think So!_3

Mary was an only child. She came from an ordinary family and worked at a publishing house. She worked diligently every day but was always harassed by her manager.

“Do You Believe In Magic?”Cha Jin-sung, a nineteen-year-old web novelist, is stuck in a rut after his popular story, Tales of Heroes and Demons, is abruptly cancelled. Battling with his failures, he receives a cryptic message from an unknown reader, offering him the chance to complete his unfinished story. But in a surreal twist, his response to the email leads him to an extraordinary situation—transmigration into the very world of his novel.In Meltonia, a fantastical world filled with mana and strange powers, Jin-sung now inhabits the body of a seemingly insignificant character, Kaiser Vanguard, who was written into the story out of pity.Jin-sung, now Kaiser Vanguard, uncovers a chilling realization: he must survive the events he wrote into his novel. With his soul merged with Kaiser Vanguard’s, Jin-sung must navigate the hostile landscape of Meltonia, where the stakes of his story have become all too real.As he struggles to survive and understand his transmigration, Jin-sung's main goal becomes clear: to finish the story he once cared for so deeply, now that it’s no longer just fiction—it's his reality. However, whether he'll be able to navigate the dangers of the world he created and reach a satisfying conclusion remains uncertain.This new journey will test his wit, survival instincts, and desire to complete the tale he left behind, all while facing the possibility of an ending far darker than anything he ever intended.

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

In a world where strength determines one’s future, William, an orphan with no extraordinary talents, faces a grim destiny—until a brutal attack leaves him clinging to life. Instead of death, he awakens to a mysterious and powerful entity lurking within his mind: the Shadow System, a game-like interface that promises him unimaginable power. But this power comes with dark secrets, and refusing it would mean his death. Forced into a pact with a voice that can hear his every thought, William must navigate a dangerous new reality where shadow abilities and celestial power collide. As he enters the prestigious military academy, his newfound abilities draw both allies and enemies, all while a deadly conspiracy brews in the shadows. With the odds stacked against him, William must unravel the mystery of the Shadow System and decide whether to embrace the darkness within—or be consumed by it. His journey from a bullied outcast to a potential god will challenge not just his survival, but his very humanity. Power always comes at a cost—will William be able to pay the price? “What am I?” William asked the system. The system’s voice echoed in his head, cold and indifferent. “You are nothing.”