I have Immortality In The Cultivation World - Chapter 436 - 339: No Choice but to Resist_2

Humanity’s first 8th Class Mage.

Betrayed, he traveled back 30 years into the past.

The story follows Ian Page, archmage and the first man to break through the 6th class, then through the 7th and become the most powerful mage, an 8th class mage.

After a lifetime of war and killing, the continent was finally unified thanks to his efforts. Now, old, his wish is to live the rest of his life in peace and try to find salvation for all the blood he spilled. However, his old friend, maddened by paranoia, couldn’t tolerate someone so powerful, so he betrayed Ian and killed him.

In his last breath, he cast a time magic that allowed him to travel back to when he was a young boy. With all the knowledge he previously had, he decided to do things better so he could end with less regrets.

As the last abyssal demon in the world, Wen Long was pulled into various worlds to do tasks by a guy who claimed to be a system. The goal of her mission was to save those villains who had been blackened for various reasons…

- Description from Novelupdates

JAYDEForged in the crucible of Xi Corporation’s labs, Jayde—once known only as SN1098—is a genetically engineered super soldier, her body honed to a razor's edge through decades of fighting humanity’s brutal wars. Her rebellion against her creators sparked a desperate battle for her people’s survival, only to end in betrayal and a fiery death on Crypso 3Q3U, her sacrifice shattering the corporate chains binding thousands of GESS lives. Yet death is not her end. Jayde awakens, impossibly, in the tortured body of a young girl on a strange world untouched by the technology she knew—no starships, no replicators, no blasters, only the primal pulse of magic. Bound to an ancient artifact pulsing with secrets, she must navigate a realm of powerful mages, mythical creatures, and lurking monsters, her old instincts clashing with the arcane forces now at her command. Her soul, scarred by battle and betrayal, carries a darkness that threatens to consume or redeem her as she carves a new path.RENRen, the fierce demon king, stands as the last bulwark against his race’s extinction, his heart a furnace of primal fury. To save his people and halt the malevolent Zartonesh’s invasion of the realms, he must venture to the Lower Realm, where the Devil Wars first ignited. His fate entwines with a young woman—Jayde—whose soul, steeped in shadow, stirs the ancient beast within him. Her vast, untamed power could be the key to salvation or the doom of all he fights for, her presence a spark to his fire, a bond that could forge or shatter destinies.AN EPIC JOURNEY OF MAGIC AND REDEMPTIONJayde trades her blaster for a sword, stepping alone into a universe where magic hums like a Centauri war-chant, guided only by a mysterious artifact that whispers of forgotten truths. She journeys across dimensions, learning the art of spellcraft, forging alliances with unlikely companions, and facing enemies born of myth and nightmare. As she grapples with the darkness within her soul—a remnant of her past life’s pain and betrayal—she searches for her true-mate, a bond that could anchor or unravel her. Will she master the magic of this strange world and rise as its savior, or will the shadows she carries bring ruin to all she holds dear?WARNING: This tale unfolds as a slow-burning romance, weaving love and loss through a tapestry of magic, sacrifice, and defiance, as Jayde’s legacy burns brighter than any star.

This novel is also known as Master Fu's Mysterious Darling Wife

She is the The Young Miss of Military family Shen, her face is peerless, her temperament is cold, and she is her family’s treasure, but isn’t accepted as one’s child by her mother;

He is The Sole Heir to the top giant Fu Family, his power is unparalleled, indifferent high-born, the captain of the mysterious military force, and the youngest commander-in-chief.

Because of her grandmother’s wishes, she married him at lightning speed. She thought that it was a marriage that she needed, but she didn’t expect to be greeted with his extreme pampering.

- Description from Novelupdates