Gender Swap: I Awaken the Demon Lord Development System from the Start

(Invincible protagonist + System + well-earned power fantasy + strong female lead + independent heroine + decisive and ruthless + female-led story + gender transformation + male soul in a female body + dark cultivation + fantasy cultivation + demonic cultivator + body cultivator + sword cultivator + yandere + corruption + eerie atmosphere)

In his previous life, Lin Xuan was an Outer Sect disciple of the Heavenly Sword Sect with thoroughly average talent. After he secretly read a fragment of the ancient demonic art The Demonic Strategy, the sect branded him a traitor and hunted him to his death.

As he lay dying, the [Demon Venerable Cultivation System] awakened. The System told him that if he wanted to survive, he had to possess the body of an unparalleled beauty and be reborn as a woman.

He agreed.

From that day on, Lin Xuan ceased to exist. There was only Lin Jiuyou.

Violet hair and eyes, bewitching and breathtaking, bare jade feet, beauty steeped in wicked allure. She reforged her foundation with the Supreme Yin Demonic Body and forged her path of demonic cultivation through slaughter and plunder. Anyone who stood in her way died; anyone who defied her perished.

She was greedy, bloodthirsty, yandere, and mad, yet so devastatingly beautiful that she captivated all living beings.

Starting as an ordinary mortal, she climbed over mountains of corpses and seas of blood, step by step ascending to the summit of the Nine Heavens, becoming the First Female Demon Venerable, feared throughout the Myriad Worlds.

[The cultivation stages are listed in Chapter One]