When the Doctor Uses A Hack - Chapter 1950 - 1956: Participation!

A human from Earth is thrust into the [Hunter x Hunter] world, becoming the Zoldyck family’s defiant, red-eyed prodigy. They call me a genius and the rightful heir, but I say that’s Killua’s burden to bear.Armed with crimson eyes, and a subtle yet powerful system, I’ll rewrite destiny, upend the world, and embrace the chaos with a wicked grin.

Jiang Shang travels through the Zongman world, but the first world is Fuyuki City?

Joan of Arc, who was not supposed to be alive, came to her door and begged him to participate in the Holy Grail War?

I thought it was the beginning of hell.

At the critical moment, the system awakens!

Just make choices, or rewrite the plot, to get amazing rewards!

“Ally with Joan, get: Top Heroic Spirit Template!”

“Choose to save Matou Sakura, get: Imaginary Space!”

“Summon a mad-ranked servant, get: the holy gun of the end!”

The Holy Grail War begins!

Facing the arrogant King of Heroes, Jiang Shang showed his magic whip under the dull gaze of all the heroes!

“Arrogant tyrants should be beaten constantly.”

“I won’t stop until you admit your mistake.”

- Description from novelbuddy

Su Xiao is a cold-blooded teenager 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!!

Traveling through worlds, doing extremely dangerous missions, collecting special items, leveling 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…

- Description from Novelupdates

Kyros was no hero—nor was he a villain. A pragmatist to the core, he turned Earth into a chessboard of chaos, bending nations and empires to his will before meeting his end. But death was only the beginning. The Devil intervened, pulling Kyros into Hell with an irresistible proposition: a second chance at life in a world far removed from Earth—a world named Neva.In this fantastical realm of knights, nobility, magic, and divine power, Kyros becomes the key piece in a wager between God and the Devil. Reborn as Rasmus Blackheart, a disgraced young noble, his task is clear: unleash chaos and topple the order of Neva, just as he did on Earth. But the Devil has added a twist to the game—he’ll serve as Rasmus’s companion, not as a guide but as a mischievous, manipulative force, more likely to hinder than help.Navigating a world brimming with intrigue and divine interference, Rasmus must survive, scheme, and rise from ruin to reshape Neva in his image. Will his cunning be enough to outwit his foes—and his so-called ally—or will this chaotic partnership lead to his downfall?