Naruto: I Became Orochimaru's Apprentice - Chapter 14 - 10th Birthday- Flashback

He holds a god-level sign-in system in his hand, punches the goose factory, and steps on the pig factory. Do you think there is no good game?
First feed you two mouthfuls of tainted milk powder, and then send you the legend of the dragon and the Hearthstone gold cartoon for free.
What? Still not satisfied? League of Kings out-of-print skin, give away!
Satisfied? Tch, this is just the beginning…

- Description from novelbuddy

Astrid dedicated her life to Leon, believing in their love, their pack, their future. But the devastating return of her sister, Clara, as Leon's destined mate, shatters Astrid's carefully constructed world. Betrayal cuts deep, leaving Astrid stripped bare and forced to confront a horrifying truth: her loyalty was misplaced, her sacrifices meaningless.Just as despair threatens to consume her, Kaeleen, a magnetic and rebellious Alpha from a rival pack, storms into her life, igniting a forbidden passion that challenges everything she thought she knew. He offers her a chance to escape the suffocating control of her past, to claim a life of her own, a life where she is the priority.But Leon won't relinquish his prize so easily. Obsessed and dangerously possessive, he unleashes a storm of violence and manipulation, determined to drag Astrid back into the darkness. Now, Astrid must make a desperate choice: succumb to the chains of her past, or embrace the dangerous allure of a love that could save her... or ignite a war that will consume them all.

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.

Lucius was a man born to a pair of lowly servants that worked for the Great Demon worshiping Barrom clan. Growing up in the harsh conditions of the Barrom clan where magic and power reigned supreme, he weathered though humiliation and schemes. Knowing that he wanted to be the oppressor than the oppressed, he began his conquest. Not averse to betraying or scheming, Lucius made use of his allies as mere pawns to be sacrificed.

Learning that a powerful artifact lost eons ago was hidden in an ancient ruin, Lucius betrayed and sacrificed one of his closest people, his lover without hesitation.

But he didn’t know that fate had a different plan for him and the artifact he had yearned for would send his soul hurtling across the cosmos, forcing it into the broken body of a young man called Asher Inanis. Coming to his senses he finds the world to be completely different where the magic of his previous world did not exist, but what did was ‘Gifts’.

Witness how he learns about the world, gains power and reigns supreme against all odds becoming the Demonic Sage.