Ultimate Gamer System: Factory Must Grow! - Chapter 91: Chief Voiderling... 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

Reborn Flames, a writer, who's known for his shitty novel, ‘The world of trials’, found himself stuck in his prologue. Not a writer’s block. Actual stuck as in real life stuck in his novel.Everything seem to go well yesterday, he was offered an adaptation for his novel, and a big interview was arranged by his company.But when he opened his eyes, he awaken to see a white room, and he mistakes reality for some sort of dream

An advertising director is reborn in 1988 Hollywood as an eighteen-year-old blond-haired westerner named Eric Williams.

There was a Senior Brother and a Junior Sister. One of them was transmigrated to this world and had cheats while the other was the reincarnation of a Great Emperor.