MTL - Armageddon: Shelters Can Be Upgraded Infinitely - Chapter 31 Heavy rain, catastrophe!

This is a story that follows the courtship between a stone from Hell and a god from Heaven that begins in the underworld and spans for three lifetimes in the mortal realm.

After the Fall of Guardian God. His legacy was passed on to Zack. Zack, Who was quite ambitious and Powerful. Can He follow the footprints left behind by the Guardian God or Forge own damn legacy till the end?

He is Smart, Calm, and Collected. Decisive during decision-making. He learns and grows. In the world of Humans, Monsters, and other unknown species. How is he going to overcome the challenges? and began his journey towards the Unknown.

Known as the youngest academician-level senior engineer, Zhao Guoyang was reborn in the 1990s. In this era of economic globalization, with his extraordinary wisdom and extraordinary insights, he created one miracle after another and became a name that shocked the world!

Wisdom is condensed every bit, brilliance is created by sweat, and witness the rise of a great power!

- Description from novelbuddy

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.