The Strongest War God - Chapter 21

Corporate slave Alexander dies with only one regret—not finishing the fantasy novel in his hands. Fate has a twisted sense of humor when he awakens as Alexander Flamingo, the perverted villain destined to be expelled and killed in that very story!Armed with complete knowledge of the original plot and a mischievous “Harem King System,” Alexander plans to rewrite his fate. No longer the one-dimensional pervert of the novel, he'll use his future knowledge to manipulate heroes, seduce heroines, and rise from disposable villain to the true mastermind of this world.The system grants him power through every relationship he builds—but can this calculating reincarnator use his second chance to avoid his predetermined death and become the ultimate Harem King? One thing's certain: this story won't follow the original script.

I, Zatiel, Abyssal Lord, Ruler of Death and Destruction, Nightmare of Dys, have AWOKEN!!!!!.

His life contains events that can shake the universe:
-Fighting against Tiamat, Creator of Evil Dragonkind, in the first circle of hell, while billions of demons and devils butcher each other beneath them
-Start a World War against the Heavenly Race, and transform himself into a Golden Sun while he slaughters their greatest warriors, the Archangel.
-Enter the Final Gate and fight against the Outer Gods.
-Tearing the nine levels of Baator during his battles against the Prince of Evil, Asmodeus.

With his memories as a ruler of the Abyss and a Universal Existence, Zatiel will rise again.

Holy Lord, possesses the ability of zodiac signs, dragon charm, can spray high-temperature flames, pig charm, emits laser light from both eyes, horse charm, heals all injuries, dog charm, immortality, rabbit charm, possesses light like or even surpasses light speed, chicken charm, suspended in the air, monkey charm, transform into any form, snake charm, transparency, sheep charm, soul out of body and even control soul, tiger charm, adjust yin and yang, rat charm, grant the ability to move still objects , the cow charm, has infinite power (some abilities are fabricated by me), this article is about the protagonist who has the Holy Lord system, travels through many anime worlds, and promotes his majesty… [Diga (in progress) Hokage (unfinished) Open) Pirate (unopened) Attack on Titan (unopened) Tokyo? Brother Zheng ㄎ Chun? Kai) Conan (unopened)…〕

- Description from novelbuddy

A modern university graduate, traversing the window between two worlds, steals a celestial cultivation opportunity that originally did not belong to him. And this celestial technique, quite unorthodox...My credibility should be assured. In order to be responsible to the readers, I must earnestly remind you: my book is easy to linger on in your thoughts, so proceed with caution.