The Primordial Record - Chapter 18: Hush... Dear

Reborn in the world of One Piece, I, Karl, was granted a unique “Gacha” System. Every five years, I get to smash a golden egg and pull a legendary prize.At age 5, I pulled the [Infinitely Evolving Monster Body]. As long as I keep eating, I keep getting stronger. The seas would soon fear another monster like Big Mom.At age 10, I pulled the [Sealed Mystical Spear]. A weapon capable of converting my stamina into a beam of pure light, capable of annihilating anything in its path.At age 15, I pulled my greatest prize yet. A card from another world... the legendary [Blue-Eyes White Dragon]!At age 20... the world was no longer ready for what I would become.My legend begins in the East Blue, but my destination is the heavens. They call me a pirate, a monster, a king.But my true title is... The Dragon Knight.

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.

When he arrived in this world, many familiar stories had yet to begin: Sleeping Beauty had not yet been born, the magic lamp lay buried at the bottom of a treasure vault, Snow White’s father had just remarried, and the Little Mermaid was still playing in the sea with her sisters. In the heart of the desert, the Land of Oz had not yet welcomed the girl named Dorothy.Then he came—the wizard of miracles and wishes.…Many years later, even illiterate children knew his legend: If you find yourself in the darkest abyss or hold the most fervent desire, you might encounter a handsome boy cloaked in robes in a distant forest or lonely mountains.He is the omnipotent wizard, the all-knowing prophet, the sage revered by kings, and the mentor of legendary heroes. He gave Pinocchio life, granted the Little Mermaid an immortal soul, and heard the pleas of both princesses and beggars.Now, it’s your turn.

Jason was just an ordinary student at Westwood University's Hunter Department, known for never awakening any special powers—even at 21. Frustrated and desperate, he spent countless nights dreaming of finally unlocking his hidden potential.One lazy morning, as he lay in bed dreading another day of ridicule, Jason felt a strange surge of excitement. Without warning, he awakened a bizarre but thrilling power: the “Leisure Life.” His smartphone buzzed with a mysterious app, and curious, he tapped it open.In a flash, Jason found himself exploring abilities he never imagined—like using points to enhance his body or entering worlds straight from adult videos. Determined to test his newfound powers, Jason dove headfirst into the explicit world of JAV, a video he'd secretly watched only days ago.Life was finally about to get exciting.