Start in DxD as Motohama: Leveling Up in Another World - Chapter 29: Surprises that seem endless

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.....

-----

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

“He” was originally a weak and pitiful “sissy”. Once reborn, he became an ancient martial arts genius with both medicine and poison. The national male god.

Don’t touch anyone who belongs to her, and she will hold what is not her, and she will never be merciless when she abuses scum and face.

He is a business genius who covers the sky with one hand in Huaguo. He has a dark belly and is decisive in killing. He is the only one who turns into a loyal dog in front of her.

She kills, he sets fire. She poisoned, he silenced.

One day, the pampered and lawless Lu Xingchen said in disgust, “Brother, they all say you are my dog.”

- Description from novelbuddy

Bai Muchen had it all — not only was he the most renowned martial artist of the Nine Heaven continent, he even had the Five Meridians of Tianling and was engaged to Xuan Qingzhu, the beautiful daughter of his mentor. But everything falls apart when he’s set up by his fiancé and mentor during a cultivation session, and he is killed.

Reborn as a young man named Xiang Nan, the heir of a declining family, can Bai Muchen get his revenge?

Noan transmigrated to a world that blends advanced technology and magic, with countless gates leading to other strange worlds.In that world, he took over the body of a young man of the same name who had just died.He realised that in this world, he was one of the 0.1% of the population who had the ability to become a landlord and had the right to go to mysterious lands to build territories.However, he was only a Rank F lord, the lowest and weakest rank in the landlord rankings.Besides, his family was like blood-sucking demons. Not only did he wear out his labour, but his younger brother was also jealous of him becoming a landlord, so he hired thugs to beat him to death.Fortunately, the 'old Noan' died, giving the 'new Noan' a body to live again.This Noan was not a coward; he was not weak like the 'old Noan'.And of course, the goddess of luck smiled upon him. Although he is only a Rank F Landlord, who can only summon useless Skeletons, he possesses the only Rank SSS talent in the world - Almighty Fusion.He can fuse ordinary skeletons and transform them into the King of the Undead, the lord of hell.He can help a weak succubus become the almighty fallen angel.He can turn a small lizard into the King of Dragons, the nightmare of all creatures.Besides, Noan also begins to lift the curtain that has hidden the truth about the new lands.