Monster Synthesis Master - Chapter 554

An 18-year-old girl who lost her family in an accident, Yamano Mitsuha falls off a cliff one day and transferred to a different world with a civilization level of medieval Europe. Mitsuha who discovered it was possible to go and return to Earth after a deadly fight with wolves decided to live in both worlds.

「For the sake of security in old age, I will aim for 80,000 gold coins!」

I will try not to let strange things circulate and distort the progress of the world, but I won’t hold back for the sake of my easy life and safety! While carrying three handguns along with words and deeds that appear decent, in her head, Yamano Mitsuha is a sly girl.

Making an effort to make money even with a small body that looks like a child to foreigners!

Oh, my secrets are too dangerous, you said? It’s fine, it’s fine! I’ll transfer away when push comes to shove!

A scientific genius named Thomas Harrier was transmigrated to an imperial prince body after a car accident that took his life. He found out that he is in a world similar to our own with a timeline akin to early twentieth century. The body that he is occupying was the imperial prince of a failing empire who suddenly rose to power after a successful assassination attempt of his father. Unaware that the attack is just the beginning of what is to come. He faces many challenges throughout. Will Thomas Harrier be able to live his second life in peace while running an empire and getting it back to its former glory? Or will he succumb into a conspiracy lurking within the country's borders?

Expect some:

Cold war era techs.

Super battleship with advanced electronics, propulsion, and fire control systems?
Helicopters?
Missiles?
Modern medicines and equipment?
AC-130?
A nuke?
Challenger or Abrams or Leopard?
F-4 Phantom or MIG-21?
Colored TV's.

Everything!!!

PS. Cover not mine, I just found it on google.

“I swear I will make them pay with everything I have. I will use my very own blood to sign the documents that will end them if I must!”To Champagne Gold, life was always like a fast-moving truck with no brakes and a drunk driver, one she couldn't avoid.At the age of five, she lost her parents in a helicopter crash. Life after that was one problem to another but she held on... until her grandfather passed away as well.With his death came the loss of her position of CEO and her hard-earned shares. As if that was not enough, she was served with divorce papers and the revelation of her husband's adultery with her cousin.Dealt with one too many blows, Champagne sought to end it all. Perhaps she could be reincarnated or whisked away to another world like the books she read before, but that was not to be. Instead, a mysterious man entered her life.“Rather than escape like a coward, I can give you the power and resources to carry out your revenge. I have but one condition―marry me.”Champagne held her lips between her teeth and took the offer.However, just when she believed her new life was going smoothly, she found out another painful secret. One more painful than any she had discovered before.She had undergone a uterus removal procedure and she didn't even know it.Now Champagne is more determined than ever to get revenge on everyone who wronged her. She would do and give everything to make them pay for taking away something so precious from her.

Description
Mu Ru Yue, was a successor to her medicinal aristocratic family in Hua Xia. After being murdered by her enemy, she reincarnated in the body of a recently deceased good-for-nothing Miss in the Mu Family of the Martial God Continent, who had been beaten to death. In the throne room, she smilingly received a marriage notice to have a change in marriage to wed the infamous Ghost King from the Kingdom of Zi Yue. It was well-known that the Ghost King was stupid and foolish, with a ghost-like appearance. But who knew that he was actually the most two-faced person? Everyone laughed, thinking that a good-for-nothing was well-matched to a fool, but not in their wildest dreams did they even consider that she was actually a peerless genius in the making. When Mu Ru Yue looked at the man, who had a handsome God-like look, she said, gnashing her teeth, “Ye Wu Chen, you lied to me. How are you a fool at all?” The Ghost King chuckled as he affectionately embraced her. “By your side, I’m willing to be a fool that you can freely order around.” Miki’s summary The previous owner of Mu Ru Yue’s body had been poisoned. Because of this, her meridians were blocked, hindering her cultivation, which eventually led to her being known as trash. After being beaten to death, Mu Ru Yue, who had originally been a successor to a medicinal aristocratic family in Hua Xia, reincarnated into her new body. They want to seal my path? I will train to reach the peak of the realms! They give me a foolish prince as my husband? I can make do with him. It would be easier for me to deal with him, rather than with other candidates who would be thrown at me in the future. I shall strive to become powerful enough that nobody will be able to mock or kill me. Associated Names Beautiful Alchemist: Ghost King“s Bewitching Wife EAA Enchantress Amongst Alchemists: Ghost King’s Wife Juésè dān yàoshī: Guǐwáng yāo fēi 絕色丹藥師：鬼王妖妃 绝色丹药师：鬼王妖妃