Counterattack System appeared when I'm already At The Mahayana Realm - Chapter 723 - 722: Empress Yu Yin

Elias had never been lucky — not once, not ever.Abandoned at birth, raised in suffering, and tormented by a life that never gave him a break, Elias trudged through existence like a ghost wearing human skin. By the age of thirty-two, even his heart gave out, quietly and without drama — just like everything else in his life. It simply… stopped.But death wasn’t the end.Instead, Elias found himself face-to-face with a stunning goddess — the Keeper of Fate. And for the first time, someone finally told him the truth: his entire life had been a mistake. A cosmic error. His Karma, meant for another, had been switched at birth, condemning him to a life of endless misfortune.To make amends, Fate offered him a second chance — a new life, with the luck he had been denied.With a single pull from the divine card deck, Elias drew the Legendary Extraction Talent — an ability that allows him to absorb powers, skills, and even laws of the world itself.From a broken man to a rising force, Elias will forge a new path.He will extract the power of heaven and earth.He will defy fate and ascend to the apex.And this time… luck is finally on his side.

Elara was not a nosy person, but something about her supposedly perfect boss helplessly weeping at night in an empty office triggered her curiosity.Mr. Terrence, her boss, was the ideal image of perfection: powerful, rich, and amiable. There had not been a single flaw in him until the day she saw the crack in his mask.Not only was he not the dominant figure she had assumed, but he was also clingy, sweet, and... wasn’t this the ideal puppy boyfriend?! How was this possible? Her boss was actually a secret softie!Follow Elara as she navigates the chaotic relationship with her 'perfect' boss, filled with nothing but surprises!

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.

The celestial celestial beings who lived for more than 100,000 years were born and reborn in a small monk in a human world.
His motto: “It’s not as good as a medicinal medicine for ten years of hard work.” “Even if you practice a copper-iron bone, it’s not enough for my soldier’s attack.”

- Description from Novelupdates