The King of The Worlds - Volume 3: Chapter 60 - Ten Thousand Ways To The Stars

The Revered Master, Yu Yan, known as the number one in the cultivation world, waited for sixteen thousand years, and finally took in a disciple. He taught her carefully, and took care of her diligently. He watched her as she slowly grew stronger as she comprehended the laws, and just as she was about to soar into prominence… she died!

99 is one, and nine refinements are returned to Xian.

A young town boy, stepping on Xiuxian Road, is not a family, no gold fingers, with his own determination and wisdom, the nine major cultivation system, the nine realms step by step to the peak, and finally ninety-nine one, the achievement of true immortal.

- Description from Uukanshu translation

Zavier met Cosmic Consciousness after his death. He was satisfied with every system that Cosmic Consciousness exhibited, so he wanted all of them. Surprisingly, the Cosmic Consciousness obliged him.

Zavier was reborn in an isekai full of magic and alchemy. Now, he had many routes to upgrade. Interestingly, to coordinate these systems, Cosmic Consciousness gave him the gift of being able to duplicate himself. He could clone a finite number of himself to manipulate these systems.

Magus, Alchemist, Mesmer, Tamer, Hunter, Vampire, Werewolf, Dragonknight, Necromancer.....

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By the way, it wouldn't appear NTR or some bullshit harem of courtships. MC of course will have harem but not for cliches.

One night, a premeditated entanglement.She seduced him and claimed him as her own.After a year of entanglement, she still could not compete with his destined one.After the divorce, Sheng Youxia offered a high price for a child.Requirements: supermodel legs, a strong waist, 180cm height, 180mm, 180 minutes, rejecting those who are only appealing in appearance but useless otherwise.Fu Shilü saw the advertisement posted by his ex-wife and ultimately couldn't hold back, sending her a message.“All your requirements are based on me, right? Just say you can't let go of me.”Sheng Youxia responds with a cold laugh: “Cured? Send me the test results.”