Marvel: Impregnation System - Chapter 198 - 186: Long Night Part 4 (1)

As a kind of punishment, the wings of a demon king were cut, and he eventually lost all of his power. To get back his power, he made a deal with the angel. He will go to the realm of humans to find a special girl with a special skill who is meant to be her queen. If the woman got pregnant, all of his sins would be forgiven, and he will regain all his powers. But he didn’t think that knowing her would be an adventure for him as the king of demons in the human realm.

Everyone thought that the most powerful scientist they had ever seen was a national treasure-level scientist until they saw Baizhi-
The light of technology, a cosmic scientist.

Three thousand worlds are different.

In each world, she is keen on scientific research.

This is a story of a scientific researcher who concentrates on scientific research, explores high-dimensional science in various worlds, and refuses to admit defeat and fate. The text is easy to comprehend, flows smoothly, humorously, and the plot is full of ups and downs, and it is full of positive energy.

- Description from Novelupdates

Ten years ago, John and his parents were transported into a game world.This young man, full of ambition to conquer the world, unfortunately awakened the weakest class—Furniture Maker.But what troubled John most wasn’t his class.Like most transmigrators, he had a system.The only problem was—This system kept granting him strange and absurd skills.[Ding! Congratulations, Host! You’ve acquired a concept-level skill: Absolute Diarrhea Technique. Your basic attacks will cause opponents to suffer explosive diarrhea until complete exhaustion. Any creature without an anus is unworthy of being your enemy!][Ding! Congratulations, Host! You’ve acquired a concept-level skill: Mummification Wrapping Technique. Bandages crafted by you can heal all things!][Ding! Congratulations, Host! You’ve acquired a concept-level skill: You may steal and copy the abilities of anyone named John!][Ding! Congratulations, Host! You’ve acquired a bonus concept-level skill: You may forcibly rename anyone to John!]…Years later, in the Divine Realm, a lone figure stood tall above the heavens.As the sacred hymns echoed, he raised a finger—And all the gods clenched their anuses in fear.

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.