City of Sin - Book 1, Chapter 20

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.

James Woodrow has transmigrated into a strange world of magic as student in the prestigious Ainsworth Magic Academy. Oh and with him came the gigolo system. Watch how he navigates this strange world full of conspiracies while putting the system to full use by getting all the most beautiful MILFS on the campus.

In his first life as 'Caine Wilson', was the villain—ruthless, cunning, and very powerful.He played his part perfectly, crushing the so-called “protagonist” and parading his enemies, their families, and anyone who crossed him naked through the streets.He watched with glee as the “hero” lay broken, stripped of his dignity, before finally ending his pitiful existence.But just as Caine, thought he had finally won and secured his place at the top, 'Higher ups' intervened.A booming, ethereal voice—like the universe’s pissed-off judge—shook the skies:“You have violated the sacred code of villainy! The villain shall not win. The balance has been broken. Caine Wilson, the world hereby rejects you!”Before he could even enjoy his victory, his world blinked out, like a story whose writer just erased the last chapter in frustration.Everything went dark.And when he awoke, he wasn’t Caine Wilson anymore.He was 'Su Xiaobai', a nobody on 'White Cloud Star', a world of cultivation, martial arts, and endless struggle.But this time, things were different.He could feel it—he could see through the cracks of reality itself.He could break the fourth wall!He wasn’t just some reincarnated soul; he was a villain who had 'seen the system', who understood the game.And he was about to flip it upside down.

“I think… my boyfriend is trying to kill me,” Lin Sanjiu muttered.

As she thought about that rich, handsome, and gentle boyfriend of hers, she could not help but tremble all over.

At the present, someone close to her had personally raised the curtains to an apocalyptic hell, and slowly, it was creeping up to her.

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What if earth devolved into a apocalyptic hellhole? What if you found out you not only have to survive just one apocalyptic event but have to struggle through multiple worlds with different end-world scenarios? And you get to meet more superpowered crazies than you can imagine!

Presenting the worst nightmare that your weird doomsday prepper neighbour with a bunker full of canned beans could have, Doomsday Wonderland is a novel filled with subverted tropes, non-OP characters and a female friendly label which offends all politically correct fanatics.

As ‘lucky’ humans evolved to posthumans with abilities to adapt to the New World or mutate into disgusting duoluozhongs to survive, follow Lin Sanjiu as she struggle through the multiple challenges to just live one more day… and make sense of this New World that will no longer be the same.

- Description from Novelupdates