Castle of Black Iron - Chapter 1977 - The Leader (I)

Zach was a sci-fi game enthusiast who unintentionally crossed over to a magical isekai. Fortunately, he had access to the previous game system and could fight the magic-savvy aborigines with high-tech weapons.

“Magic? No, I have the lightsaber. ”

Unlike what he expected, the system presented him with a different way of leveling up. He had to get some kind of special energy from the pretty girls' bodies on this planet so that he could unlock his weapons.

“What the hell happened? Is my sperm capable of upgrading girls? Can my blood cause those girls to burst out instantly?”

This was incredible.

The succubi were a hated race in the magical isekai because they oversucked male sperm and killed men, but not Zach.

Surprisingly, the majority of the special energy that Zach required was distributed in succubi.

He appeared to be having a fantastic journey.

……………………………………………………………

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“There are no heroes. In life, the monsters win.”

...

In 2106, [Mayhem Online], a fully immersive VRMMO game, was released. Soon, it dominated the world's economy when people could exchange the in-game currency with real-life currency and vice versa.

In the year 2107, Flynn Grey, a 22-year-old college dropout with an ambiguous history, joined in the fray of billions of people that had already started playing [Mayhem]. Hoping to uncover the game's secret and earn a fortune, he spent months on adventures without fruitful results.

For better or worse, Shura, Flynn's in-game character, ends up in a great Wyvern's den, acquiring a hidden class and a monstrous race. Join him as he defeats his past and paves his way into becoming a true legend in both worlds.

From quiet grind to legacy brew.Jun had nothing—no café, no followers, not even a bed. Just a secondhand kettle and a broken dream.Then came the Barista System.No shortcuts. No instant success. Just slow, intentional tasks... and a promise:Brew. Grow. Endure.Every pour sharpens his skill. Every cup deepens his path.From street corners to pop-ups, from whispered praise to a space of his own—Jun’s grind is just beginning.This is a story of stillness, patience, and the quiet pursuit of mastery.Because greatness isn’t given.It’s brewed—one cup at a time.

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.