Exorcist's Self-Cultivation - Chapter 5 - 00, Who is outside the door?

A Speedster in a Fantasy World

Humanity has endured for millions of years, but recorded history only spans a mere four thousand years. During that unrecorded deep-sea age, what exactly were we doing?Countless indescribable beings ruled the universe, and our powerful ancestors preserved the fire of human civilization under their threat.Then they disappeared, and we rose.Now, they are coming back, mysterious psychic powers are awakening, the flame of human civilization is slowly extinguishing, and no kings are in sight...Chen Ke opens his eyes to see a world full of ruins and himself on the brink of death.The moment his heart was pierced by the Blasphemous Dagger, he became a dying man without a heart.Able to survive only 2 hours...

King Grey has unrivaled strength, wealth, and prestige in a world governed by martial ability. However, solitude lingers closely behind those with great power. Beneath the glamorous exterior of a powerful king lurks the shell of man, devoid of purpose and will. 

Reincarnated into a new world filled with magic and monsters, the king has a second chance to relive his life. Correcting the mistakes of his past will not be his only challenge, however. Underneath the peace and prosperity of the new world is an undercurrent threatening to destroy everything he has worked for, questioning his role and reason for being born again. 

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.