The Terminally Ill Young Master is the Mad Dog of the Underworld - Chapter 35

What happens when a scientist from a futuristic world reincarnates in a World of Magic and Knights? An awesome MC is what happens! A scientist’s goal is to explore the secrets of the universe, and this is exactly what Leylin sets out to do when he is reincarnated. Dark, cold and calculating, he makes use of all his resources as he sets off on his adventures to meet his goal. Face? Who needs that… Hmmm… that guy seems too powerful for me to take on now… I better keep a low profile for now. You want me to help you? Sure… but what benefit can I get out of it? Nothing? Bye. Hmmm… that guy looks like he might cause me problems in the future. Should I let him off for now and let him grow into someone that can threaten me….. Nahhh. *kill*-

Alternative: Leylin is transported from an advanced technological era into a medieval world— except there’s magic. Equipped with “only” his quick wits and an A.I. chip fused to his soul, he sets out to become the most powerful magus the world has ever known. In a land divided into the Light and Dark Magi, the weak can either be cattle or disposable slaves. Only the strong can determine their lives, and only they have the luxury for virtue. Yet strength is only a tool for Leylin, like any other. His goal, in the end, is his own.

”When I tell you to proceed with Plan A, you can’t just ignore it and go with Plan B,” said the king.

”Sure”, she replied; she’ll just go to Plan C then! No biggie.

”If you were told to go eastwards, you can’t just ignore me and go in the opposite way,” the king added on.

”Yes,” she said while nodding. If she can’t go in the opposite way, North and south work fine too.

”You are NOT allowed to have affair with any other men!” the king then emphasized.

”Sure”. She replied. She never has to be the one having affair with the others. Others have it with her.

- Description from Novelupdates

During this chaotic era, the darkness engulfs all.
In a struggle of fire and death, despair shrouds the continent.
The line between fantasy and reality becomes blurred as a speckle of starlight penetrates the night sky.
But is it enough to reverse the downfall and fate? To regain the lost glory?

Rhode is a famed player in the game “Dragon Soul Continent”. There, he leads the strongest player guild in the game, the Starlight Guild. Just as he defeats the last BOSS, the Void Dragon, he unexpectedly awoke in a world identical to the game.

As the Summoner Swordsman returns to the continent, waves will be cast in the rivers of fate. Can he face the coming chaos and avert the destruction of the continent?

- Description from Novelupdates

I am Ye Qing. Lucky I found a [Monster Factory] application.