World of Immortals - Chapter 186 – Dragon King’s Battle Begin

Aomori, who has a monster-fighting system, came to the world of One-Punch Man and gained the ability to enter various instances.

Therefore, “Founder of the Hero Association”, “NO. “And other titles fell on him one after another.

Comprehensive flow, the main world One Punch Man.

Completed dungeons so far: Pokémon – Demon Slayer – Sword – Pokémon – Digimon – Spell Return – Yokai Comprehensive World (Girls that Noragami Inuyasha can see, etc.) – Pokémon – One Piece-re0-Dragon Ball wait.

- Description from novelbuddy

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.

Magic finally reached planet earth, but it was not like we expected. It came in the form of mystic energy!

After the age of awakening, all living things finally entered the path of evolution.

Mystic Beasts invaded earth, destroying the world as we knew it, but we survived as we finally gained the ability to utilize the energy that the beasts came with.

Mystic Warriors were born, and humanity finally found a moment of reprieve, but the Mystic Beasts were still winning.

Rex Vector, an apparently mystic energy-deficient sword genius who lost everything to the war turned out to be the last inheritor of an Ancient Bloodline.

On fully awakening his bloodline he was granted a system and his whole life changed for the better.

Life held much more in store for him though as the contents of his first system mission revealed a reality to him that he wasn’t sure he wanted to accept.

[You are hungry!]

[You must drink human blood within 24 hours!]

[Penalty for mission failure: Death!]

The person with the best martial art skill in the world, whose prestige is unparalleled. The head disciple of TianQing sect, the leading sect of all Six Great sects, and Jianghu’s number one, Ming ChangYan shaoxia.

During a decisive battle, he slipped and fell.

His ten years of cultivation was completely annihilated and reduced to a normal human.

Fortunately, he was lucky enough to have fate decide that his life shouldn’t end there, and he survived.

The doctor told him, “To gain back your cultivation, enter the palace as a concubine!”

In order to get the medical herb that was given to the emperor by the XiYu Region, the immortal’s grass, Ming shaoxia could only wear a skirt, apply makeup, endure the humiliation, suffer patiently, and join the palace drama.

Ming ChangYan: This shaoxia is shameless.

Unfortunately, just as he dressed up in drag and entered the palace, he meets the man he once picked up from under a mountain.

…..

Ming ChangYan: I was joking just now…..this is too shameless!

If I were to be found out by him, my (old) number one reputation would go down the drain!

- Description from Novelupdates