MTL - Ordered to Marry Thrice, The Mysterious Wangfei - Chapter 319 even if he is a big disaster, there is him.

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.

Super soldier Su Chen, returned to the city and returned to the city, set off all directions! The king of soldiers that once famous the world, let everyone be convinced!

- Description from xbiquge

Jiang Chaosheng has passed the book. The male protagonist is the reborn prince with excellent luck, and he is the cannon fodder prince who is destined to fail in the palace fight. He is about to be sent to the desolate island in the extreme south, and the fiefs are less than 100 people.

Jiang Chaosheng sunbathed salt, fished… He soon prepared abundant supplies for the rest of his life, but there was an accident when he was eating and waiting to die. He was slow to discover that there were fish thieves in the house!

Jiang Chaosheng set a trap and successfully caught the fish thief on the spot
It was a beautiful merman with eyes like emeralds and hair like sapphire
The poor little merman has a slender waist, glistening scales, and a pitiful posture: I can’t afford the supplies, but I can be your wife and give birth to a little mermaid to repay you
Jiang Chaosheng: Also… not impossible
After a long time, Jiang Chaosheng learned that his wife is actually the villain of the original text, the psychological shadow of the male protagonist Long Aotian, the King of the Sea who is rich in the sea.
The lucky salted fish attack vs the cruel shark emperor
Content tags: childbirth, spirits, ghosts, sweet texts, through books
Search keywords: Protagonists: Jiang Chaosheng, Ji Xuanbing ┃ Supporting roles: ┃ Others:

- Description from novelbuddy

Anyone who could construct a stable Spell Model could become a Wizard — that was the Wizards’ ultimate secret! Having been given a new life as the son of an aristocrat and armed with a super quantum computer from his past life, Spell Models came as easily as breathing to Merlin. With this overwhelmingly huge advantage, would Merlin become the greatest Grand Wizard of all time?

- Description from Novelupdates