The Earth Is My Dantian - Chapter 864

Waifus, Mechs, Magic! Witness a mind-blowing ride of spell-slinging beauties, earth-shattering mech wars, and an arcane system so deep you’ll lose yourself in its brilliance! Empires crumble, celestials clash, and the birth of legends in the most explosive, heart-racing epic you'll ever read!Jack Squire, a professional debris collector in Earth's orbit, witnesses the unimaginable — the colossal magical sigil igniting the sky above his hometown, Germund. As communications fail and soon an apocalyptic light blasts skyward and splits the moon in half, horrifying chaos dawn.Determined to seek the truth, Jack must navigate a perilous descent into a war-torn planet, where arcane magic and advanced tech clash in a brutal conflict between two empires.Osten Empire with its arcane: Magic & Spells (Essence and Slot System)V.S.Dunkelheit Empire with their war armours: Armatus (Think mecha)In this gripping sci-fi and fantasy adventure, ~one of a kind! Jack's quest to uncover the truth behind the cataclysm and save what remains of his world leads him into the heart of a war that shall decide humanity’s fate.

The mighty heavens exist, ruling over all things. Those favored by its will are granted power and fortune, while those who dared to oppose it perished, leaving none behind. This is the tale of a man who once defied the heavens, underwent multiple reincarnations, and returned once more to the cultivation world. But here’s the twist. This young man remembers nothing of his past lives and is simply a teenager from Earth. How will he who has no knowledge of cultivation and experience in fighting, survive this grim world while being an inner disciple of a lower realm force—or so Xiao chen, the teenager thought till he heard a systematic sound in his mind. [Ding! Host has awakened the heaven’s destined villain system!]

Chen Yan travels between worlds, ending up becoming an honorable prince in a medieval fantasy world. Yet this world was not quite as simple as he thought. Witches with magical powers abound, and fearsome wars between churches and kingdoms rage throughout the land.

Roland, a prince regarded as hopeless by his own father and assigned to the worst fief, spends his time developing a poor and backward town into a strong and modern city, while fighting against his siblings for the throne and absolute control over the kingdom. Join Roland as he befriends and allies with witches and, through fighting and even farming, pushes back invaders coming from the realm of evil.

- 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.