Arifureta Shokugyou de Sekai Saikyou (WN) - Chapter 115

A ritual gone wrong gave him the world's deadliest Class—now all he wants is blood.Zeth stole the most powerful ritual magic in the world from a mad cultist. A Class that's fueled by the blood of his enemies and human sacrifice. One that's illegal to use, punishable by gruesome death. And now that he has it, he's faced with a choice: hide away for the rest of his life from those who would hunt him down, or embrace the power, becoming the hunter to get revenge on the murderer that stole his friends' lives.For Zeth, that's no choice at all.His enemies have to die. And he plans to use every drop of blood, eldritch ritual, and demonic summoning he can to kill them.

This novel is also known as Gu Daoist Master

Humans are clever in tens of thousands of ways, Gu are the true refined essences of Heaven and Earth.

The Three Temples are unrighteous, the demon is reborn.

Former days are but an old dream, an identical name is made anew.

A story of a time traveler who keeps on being reborn.

A unique world that grows, cultivates, and uses Gu.

The Spring and Autumn Cicada, the Venomous Moonlight Gu, the Wine Insect, All-Encompassing Golden Light Insect, Slender Black Hair Gu, Gu of Hope…

And a great demon of the world that does exactly as his heart pleases!

—

*Gu (蛊) referred to poisonous insects in various cultures in South China while in folklore Gu spirits could transform into all kinds of species.

- Description from Novelupdates

Pei Shu'er finds herself transported into a novel, embodying the notorious role of the Heir's wife. Her husband, the Young Master, is destined to become a charming, powerful, tragic, and disabled villain. Currently, he lies gravely injured and unconscious, and Pei Shu'er is the very catalyst for his dark transformation.From the outset, her husband attempts to strangle her!Surrounded by a family of the elderly, the young, and the injured, Pei Shu'er reluctantly takes on the responsibility of providing for them all. In her left hand, she wields life-saving materials worth billions from her spatial realm; in her right, she brandishes silver needles with the skill to heal the dying.She opens shops, promotes trade, advances technology, and builds cities, transforming the desolate land into the first city defending the border. Single-handedly, she fortifies the frontier and earns the reverence of all as Miss Pei.After curing the villain's leg ailment, he rises through military achievements to become a Great General, and later expands his territory to become the supreme emperor. Having repaid the debts of her original self, Pei Shu'er believes their obligations are settled and presents the divorce papers as per their agreement.The villain, who once sought to strangle her, now stubbornly pulls her into his embrace. “My heart belongs to you. Where else do you think you're going?”