Monarch of Darkness, Arsene - Chapter 436: Abyssal Night

Good news: You've transmigrated! And you have a phenomenally powerful master!Bad news: When you were ten, your master ran off and left his wife behind, leaving you to prop up the crumbling sect all by yourself.Good news: An uninvited junior sister shows up, claiming to be the number one beauty in the world!Bad news: You were born blind.Good news: Suddenly, one day, you realize you have regained your sight!Bad news: Something is wrong with your junior sister… Something is wrong with your master's wife… Something is wrong with all of them!…You Su , who had always been a blind man, wakes up one day to see giant tentacles dripping with copper-green slime writhing restlessly all around him. He traces the tentacles back to their source—the entity wearing that snow-white, celestial dress is no holy fairy maiden, but a shifting grotesque mass of filthy flesh.…“You can see?”“Don't be afraid, Fairy. I'm blind.”

Ha Si-heon is a brilliant but obsessive Wall Street financier who has built an immense fortune driven by a fear of financial insecurity. After enduring a tragic childhood, losing his mother, and navigating financial ruin with his father during South Korea’s 1997 financial crisis, Si-heon immigrates to the U.S. He fulfills his father’s wish by becoming a doctor but finds himself drawn to the lucrative world of Wall Street.At a top hedge fund, Si-heon leverages his medical expertise to dominate biotech investments, thanks to an unusual ability to predict successful FDA drug approvals. He amasses wealth quickly, yet struggles with a pathological fear of spending money. His relentless pursuit of profit takes a dark turn when he’s diagnosed with idiopathic multicentric Castleman’s disease (iMCD), a rare, life-threatening immune disorder with no cure. His condition worsens despite aggressive chemotherapy, as the lack of research funding for this “orphan disease” leaves him without options.Just as Si-heon faces death, he miraculously awakens to find himself transported 10 years back in time, to the beginning of his career on Wall Street. Realizing he has a second chance, Si-heon is determined to not only reclaim his wealth but also amass enough money to fund a cure for iMCD. The story explores themes of greed, ambition, mortality, and redemption, as Si-heon seeks not just to survive but to redefine the meaning of his life.

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 her last life, she was miserable and ordinary. This time, she got into the fashion and was reborn in another world. She was still the same person… even with the same body and face. What was the point of reincarnation? A childhood companion? He always pulled her hair and made troubles for her? A handsome boy? The boy never looked at her and was 15 years older than her! A prestigious teacher? The teacher spent his days eating and drinking, coaxed, played tricks, and controlled others… Too scary and better run away? No no no, such a challenging life was bound to be wonderful! Now let me take you back to the 70s and live a fast life!

- Description from Novelupdates