System vs Rebirth - Chapter 47: Spirit Oath

After Reincarnating into Naruto World at the Warring State Era as an Uzumaki, Masahiko thought that he got a useless System. He lived for 48 years as a normal, below average Uzumaki Shinobi.

That changed when he finally knew how the system works the day of his 49th Birthday!

- 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.”

“Look at you, you were this teeny-weeny when you were little.”Using both hands, Shao Zifeng gestures how small his pet beast used to be. He then raises his head and looks at the gigantic being in front of him.“Just how did you grow into this ferocious form?”

After finishing the DxD light novel, a Warhammer 40K fan loses his life and finds himself, without any clear explanation, in the body of an angel banished from paradise by his Heavenly Father.[Ding!!!][Congratulations, Lord Sanguinius.][You have been selected to become a member of the dimensional discussion group.]“'m just a member... not the administrator?”Author's Note:A story born from a whim, but one that can flourish with your support.## Warning:I do not own any of the works represented here, such as DxD, Warhammer 40k, or others (the cover doesn't belong to me either).This is a harem (small, but still a harem).Author’s note:!!!! Another important piece of information!!!Please, do not read this story if you are unable to distinguish between an Ecchi light novel and religious events or statements related to various sacred scriptures.If that’s not the case for you and you post crap in the comments, I’ll just delete it (this is a fanfic, not a place for religious debates or discussions related to the divine word).Honestly, I didn’t want to include this in the synopsis (it makes me seem like I hate faith when I actually have religious friends), but a VERY intelligent reader managed to persuade me to explain to people the difference between an Ecchi light novel and the precious writings of human history