MTL - Magneto of Hyuga - Chapter 74

A heaven-defying ring that allows objects to be brought back from games into reality!

Before ‘Dawn’ was released, it already obtained the status as the ‘second earth’. Jiang Fei, a young teen who loves games came into the world and quickly rose up in power, status and fame. With his unmatched skills, he decimated all foes that oppose him. However, such rise would attract the attention of many, even as he tried to play everything off as low-key, something just don’t work out as plan…

“If trying to keep myself away from the spotlight no longer works, then come! Let the world know of my existence!” – Jiang Fei

- Description from Novelupdates

I Became Hades, the God of the Underworld from Greek and Roman Mythology

Beneath the peaceful façade of the modern world, an undercurrent of shocking crimes roils in the underbelly of society.

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.