From Abyssal Invasion to Bursting Stars with a Single Sword - Chapter 194 - 161: Returning a Favor, Second Transition Source Material

Everyone dreams of gaining magical powers at some point in their lives, be it flying through the air or throwing fireballs from their hands. When the time finally comes, and mana arrives on Earth, it's not all its cracked up to be.Transported into a tutorial with his family, Christopher has to fight to survive while trying to keep his family alive. After three grueling months inside a tutorial where tragedy and death seem to follow him around, Chris struggles for power and the chance for revenge.When the survivors return to a changed Earth, conflicts arise. Various players vie for power and to expand their influence, while Chris tries to carve out a place for himself and the rest of his family free from any more conflict.Others aren't so keen on sharing what they think should be theirs.~~~Current Release Schedule is one chapter every weekday (5 days a week) at 4 PM EST.Inspired by the amazing stories of Primal Hunter, Path of Ascension, Unchosen Champion, and Path of Dragons.

Asura – proud, warlike, cruel, heartless.

A young adult with a mysterious background follows his father’s prophecy and enters the world of «Rebirth», somehow managing to inherit the Xuanyuan Sword, and also unexpectedly obtaining the hidden class Asura.

Following the tracks of both virtual and reality he gradually discovers a secret hidden for the past billion years.

Asura, the class that used to shake the lands has now completely disappeared. He must now go on a journey to find the true meaning of Asura—until the day he transforms and becomes one with Asura.

- Description from Novelupdates

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.