Conquest of Taboo and Debauchery - Chapter 110 - - Tender Eyes

Crossing to One Piece world, he became Roger’s younger brother.

Unexpectedly, Gol-D-Roger who was in his fifties had a teenage brother. But he was so weak.

Fortunately, at the age of sixteen, he actually found himself with a possession soul system.

He had attached to the master IP man, also to the White Phoenix and to Ge Nie with his strong ability of the Hundred Step Flying Sword.

If you think that he can only Purchase these? Then you’re wrong!

Pain, Itachi, Ichigo Kurosaki, as long as there is money, any soul can be Purchased.

- 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.

The Ring of Magic had shattered.Calamities emerged.Lind, who had crossed over to become a wild monster NPC at a stronghold in the apocalyptic Magic World, saw a group of undead shouting “Pass the flame” arrive at his territory. They held lofty ideals and were willing to sacrifice themselves to save the world.Therefore, Lind prepared to masquerade as the village chief of Newbie Village.Lind: As a remnant of the old era, I will craft a ship that can carry us to the new era.Player: After enduring endless hardships, we finally met the BOSS, and then the BOSS just knelt down and swore fealty to the lord....“I, the King of Game BOSSes, Just Want to Be a Good Newbie Village Chief”“Player: Every NPC on Our Side is as Strong as a BOSS”“Player: That BOSS Actually Can't Beat the Quest NPC We're Supposed to Protect?”Tags: Lord, Farming, Kindombuilding, Fantasy, Fourth Apocalypse

They were born with magic, raised in chaos, and trained in sarcasm.Now the royal kids are all grown up—and the world isn’t ready.Between family feuds, resurrected villains, and a five-year-old firebender with an attitude, the palace is basically a magical daycare with crowns. But when revenge hits home and the kids take charge, things get wild, weird, and a little too flammable.Royal duties? Nah.Sibling wars? Always.Saving the kingdom? Accidental.Welcome to the most dysfunctional, dangerously magical, and absolutely hilarious royal family you’ll ever meet.