Naruto System in One Piece - Chapter 29: Garp vs. Leiyin

Kaidan (Kaidan refers to eerie tales of strange, mysterious, rare, or bewitching ghosts and monsters from Japanese folklore.) feed on cognition, wield information as weapons, and use information as currency, existing between the peculiarities of neither life nor death.They exist in human rumors and dwell in the shadows of the world.“Does this mean I will become a Kaidan?”In ancient times, they were worshipped as deities, empowered by faith.“Then I am a deity!”In more recent ancient times, they were regarded as demons and fed on fear.“I will become the master of Kaidan!”However, as the tides of time washed over, they gradually vanished, leaving behind only texts considered to be delusions.“To restore the glory of Kaidan is an undeniable duty of ours.”But you are not yet a Kaidan, hmm, nor a person.“Well, becoming a Kaidan counts as success.”

Story about human babies raised by monsters in a world of sword and magic.

Allen is an orphaned boy that had lived a rather pleasant life with his orc mother in the bowels of a deadly dungeon, until the day a band of humans ventured down to loot and pillage the home they had come to think of as safe.

They took everything that Allen had, and drove him further away from the humanity. In anger and anguish, Allen turned his back on the humans. He encapsulated himself in a deep-seated hatred of them, refusing to associate with them in any way—even going so far as to reject any attempt at kindness.

Allen begins his journey in a world of human with full of deceit, danger, envy, and politics.

This is a story of Xia An, a transmigrator from the end of the world, who transmigrates into the body of a cannon fodder who was the mother of the villain.

- Description from Wattpad

In the cruel world of Ranas, normal people are considered nothing more than trash. Blaze is also one of those trash. He and his mother has been treated like animals by his loser 'superhero' stepfather. But then everything changes when the SYSTEM gives Blaze a mission to kill him in exchange for superpower.Blaze does not hesitate.[Force Strike (E-rank) acquired][Force Strike has evolved into Force Impact (D-rank)][Force Impact (D-rank) has evolved...][Genesis Legion (S-rank) acquired][Genesis Legion (S-rank) has three Sub Powers...][You have acquired a new Equipment: Lantern of the Damned (Rare),...]The abusing stepfather who terrorizes his family.The bullies who made his life hell and sent him to the hospital, expelling him from the school.The despicable human-trafficking criminals who dares to kidnapp his friend.More and more people who do not deserve to live in Blaze's eyes.“I will kill them. I will kill them all.”But once Blaze has acquired more power. He now has the responsibility to decide what he should do with it.This world may be cruel and unfair but he shall be fair.Cruelty shall meet a cruel end.And the people who deserve to have a second chance shall receive forgiveness from Blaze.He is now the vengeful spirit in the night, rain down judgement on the corrupted that does not deserve their superhero title.