Harem Master: Seduction System - Chapter 14: Innocently Sleeping With His Mother Lyra

She roused from a pool of blood, vowing to exact retribution on those who had harmed her.

Betrayed by his closest friend.Abandoned by his own family.Tossed into a death labyrinth, waiting for a second, crueler death.Aaron should have died —but fate had other plans.At the bottom of despair, he stumbled upon a sealed SSS-rank Dragon God, chained and forgotten by the world.In exchange for freedom, the Dragon offered him a contract and a new name,Three years of pain.Three years of torture.Three years of absorbing the ancient mana buried under the labyrinth.When Aaron rose again, he was no longer human.He was a Legendary Dragon — the first of his kind, carrying a power the world was never meant to see.Wielding the Beast Sovereign Ultimate Skill, Aaron can tame mythical beasts, spirits, and even monsters birthed from nightmares—and share their powers as his own.The fallen will rise.The abandoned races will follow.And his wives will fight beside him.This time, Aaron will not be a pawn.He will command.He will conquer.He will become a God.Additional tags:No Incest, No Rape,, Harem, No Loli, Succubus, Elf, Angel, Vampire, Cat girls, Dragon Girls, Fox Girls, Monster Girls, Slaves, Princess, Yandere, Righteous Characters, Primordial War, Peak Lore, Gods, Churches, Mana, Transmigration, Devil, Demon, Death, Evolution. Can't think of more clickbaits.

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.

To save a doomed fantasy world, I killed the main characters, then destroyed the game world, and fell into another timeline as the academy's top seat and rival to the protagonist.Now, I'm trying to save the world and steer it towards a better ending…But I'm the final boss.