Mahouka Koukou no Rettousei - Chapter 1Volume 28 -

[Ding! You've gained ten thousand Drug Points! You can now use “Hypnotic Drugs.”][Ding! Due to the host's tendencies, the effects are twice as effective on females.][Ding! Due to the host's tendencies, the effects are three times as effective on females deeply in love with their partners.][Ding! Due to the host's tendencies, the effects are four times as effective on MILFs.][DING! New Mission: Steal the Tech Hammer CEO's wife and daughter.]

What happens when you realise that in a world of pill popping murderhobo young masters, the true path to cultivation is by making a whole lot of drugs?Let's find out.What to expect?- A lot of spirit animals and pokemon references about them!- Grenades! Nukes! EXPLOSIONS!- Life and Death cultivation stuff- Alchemy Drugs- Far too many memes

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.

Crossing to One Piece world, he became Roger’s younger brother.