The Evil Prince and his Precious Wife: The Sly Lady - Chapter 36 – Jealousy

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.

In 2121, a terrible pollution disease swept through the world.

“We call it distortion, but perhaps, the history records of later generations will call it an evolution.”

The world experienced involution.

Today, that person’s head split into two. Tomorrow, that flower would grow fangs. The day after that, that fish would climb ashore with its legs…

Lu Yan: And I am merely a mediocre doctor who treats the pollution disease.

*

Patient A: When I first grew 18 tentacles, I was having a great time eating [beep—] by the seaside. As soon as Dr. Lu came, he cut 17 of them for me. He’s really a brilliant doctor!2

Patient B: I am a poisonous mushroom. My spores are highly toxic and can be parasitic. I gave birth to hundreds of thousands of microspores, which made it worse for my already poor family. Dr. Lu helped me practice family planning when he came. This great kindness will forever be remembered!

Patient C: I have eight mouths. I was a picky eater and only ate meat, so I set up a slaughterhouse for this purpose. But then, Dr. Lu cured my picky eating. This woman of faith is willing to be a vegetarian for the rest of her life in exchange for Dr. Lu’s happiness and well-being in this life.

Lu Yan, the top of the food chain, the eternal god.

- Description from Novelupdates

When 18-year-old Kyle Conner arrives at his aunt's for a summer holiday, he expects relaxation and freedom. Instead, his life is forever altered when he crosses paths with Lilith, the demon of lust and second-most powerful entity in the underworld.Forced into a dark pact, Kyle is transformed into a demon and gifted with a mysterious system that promises immense power. But this newfound strength comes with a deadly price: Kyle must hide his true nature and navigate the treacherous world of demons, all while being hunted by Lucifer and other malevolent forces.As Kyle struggles to control his newfound powers and unravel the secrets of the system, he discovers his ultimate goal: to overthrow Lucifer and bring about a new era of peace. But with the forces of darkness closing in, Kyle must confront the darkness within himself and make impossible choices to survive.Will Kyle be able to master his demonic powers, outwit his enemies, and fulfill his destiny? Or will the weight of his newfound responsibilities consume him, dooming humanity to eternal darkness?