Book Transmigration: Brutality Forged an Unfeeling Path

(Strong warning: This is not a dark story about killing for the sake of killing. Instead, the protagonist is constantly scheming against others, figuring out how to benefit himself through strategy. If you want a story where the protagonist kills nonstop, don't read this.)

(No CP. Lots of angst early on, then the protagonist gradually starts scheming against everything. Light fantasy, light science fiction, light mystery, with chapters involving logical deduction and some quick transmigration plots.) Volume One is rather oppressive; Volume Two is funny.

Xu Ran transmigrates into a grand fantasy world formed by the fusion of multiple novels and becomes a disposable side character. From the start, he is sold and abused. He relies on a mind-reading System to scheme against others and profit for himself, but the System soon betrays him. He can only rely on himself, laying plans step by step and scheming against everything in order to meet the demands of his future self.

Countless children of fortune, protagonists, villains, reborn people, and transmigrators all oppose him. For Xu Ran, they can either cooperate or die. He will stop at nothing to achieve his goals.

(Every character who has an ambiguous relationship with the protagonist will be betrayed or used, so there is no CP. The protagonist is good to others for the sake of profit, and bad to others for the sake of profit too. The early chapters may be a little hard to stomach, and the pacing is fast.)