Producer System: My Girlfriend is a Cellist - Chapter 52 - 51: Planning a Base

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.

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

Kim Jeongjin, an editor of a publishing company on the brink of closing due to bankruptcy, ends up transmigrating inside a fantasy novel as the incompetent youngest son of a wealthy family.

And here he thought that he should live a rich life in this life…

“Why was I given a high-level skill? Don’t even bother!”

“Born of Dragons, yet cursed by the Abyss—a king of two dooms.”----Ryuk Knull was nothing—just another powerless human in a world ruled by Titans, Vampires, and Fallen Angels. Until the Knulls came and took the only family he had left.On the brink of death, he awakened the Draconic Pets Evolution System—a power that doesn’t just tame beasts but binds them to his very soul. With it, mere monsters become apex predators.And Ryuk? He is their master.But power alone is not enough.He is a fusion of the most hated and the most divine—A being that should not exist.The abyss whispers. The dragons call. And when he rises—none will be spared.This is the Tale of the Abyssbourne Draconis!