I'm the Mysterious Leader of the Salvation Organization - Chapter 546:

In a world where power reigns supreme, Zoey Monroe was born with nothing. Labeled “Mana-less” in a society of Hunters, she was the stain on the prestigious Monroe Family, a shame to one of Sunrow City's most powerful bloodlines. Ridiculed, ostracized, and treated as less than human, Zoey endured years of scorn.Until one day, at seventeen, she made a choice—to leave it all behind.Six months later, struggling to make ends meet in the city, Zoey’s life takes an unexpected turn. After another grueling day at work, she returns home, only to witness a dungeon rift tearing open behind her apartment.Drawn by curiosity—and the desperate hunger for change—she steps inside. But the dungeon is merciless. Death looms over her, suffocating, inevitable... until—[Enough Mana Has Been Accumulated!][Error! A mysterious system has already been bound to the host. Adjusting...][Ding! Installing the A Hundred Times System!]In an instant, Zoey's fate is rewritten. From outcast to overpowered, from weakling to warrior—the path to greatness has begun.This is her story.

Su Xiao is a cold-blooded young adult who’s seeking vengeance for the death of his family, yet things ended up badly for him.

As he was taking his last breaths, he heard a voice calling him from dimensions, it was a strange system reaching him, asking him if he wanted to be saved, to be Reincarnated.

He just needed to accept a contract, Su Xiao didn’t have any choice but to do so, but he didn’t know what he signed up for!!

Travelling through worlds, doing extremely dangerous missions, collecting special items, levelling up, and even killing Protagonists…

But Su Xiao wasn’t any ordinary Contractor, Su Xiao was a Hunter!

The MC crosses over to: One Piece, Tokyo Ghoul, Naruto, Fullmetal Alchemist, Attack on Titans… and Author’s Original Worlds…

Entering Tokyo in the bubble era, in this strange era, the only familiar ones are Matsuda Seiko, Nakamori Akina, Kudo Shizuka…

- Description from novelbuddy

Master martial artists were beings that no one can obstruct. A martial arts expert has been reborn into the body of a genius whose cultivation has been abolished and has been abandoned by a woman. Therefore, he starts cultivating the art of Xing Yi Quan, producing a solar system within his dantian. His innate talent tramples over all the geniuses, and even the geniuses among geniuses.

His powerful spirit and ruthless and ambitious nature, no matter who he is reborn into, will never change! Slaughter is instinctive, being cold-blooded is his personality, exterminating an entire family is only a means towards a goal, cruelty means infamy, and chasing after women… is just an interest.

- Description from Novelupdates