Lord of Pain: Becoming the Crime Boss with my Pain Extraction System - Chapter 10: An Old Acquaintance

Sincere is transmigrated person, who gain a magical tiger eye in his left eye. with this eye he decided to change his ending and became the richest person

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.

Seun Adebayo’s ordinary life shatters when he’s chosen as one of 100 humans to ascend the Tower of Transcendents, a mystical structure holding the fate of the cosmos. Each of its 100 perilous floors tests his strength, intellect, and spirit, forcing him to confront his fears and ambitions.When Seun awakens the power to manipulate cosmic energy, he begins to realize his destiny: not just to stop the rise of the Primordial Evil but to ascend beyond mortal limits. As the trials push him to rediscover a different part of him.Seun’s climb will shape him into something greater—the god of the cosmos.