Devoured everything with an S-rank predation ability - Prologue (MUST READ)

Where there is light there shall be darkness

Hero? Nahh I'm the demon.

In a world where the demons are looked on as the incarnation of evil, the human-demon war raged on across the whole continent.

The Seraphims, protector of humanity, and the Demon lords who rule across all demonkind. Amidst all the chaos, Simon was reincarnated as the lowest ranking demon noble.

A brutal world where the strong feeds on the weak, eat or be eaten, kill or be killed. A demon far off from humanity….a dream unfulfilled in his previous life will be achieved in this life. Taking on the moniker of Laplace, he destroys all his enemies and rise over them.

Sally, in order to fulfill her original wish, entered Beast World and transformed into a little white mouse, also binding herself to the Offspring System.[The Dragon Lineage has gone ten thousand years without new blood.][How many points for the Dragon Lineage?][Five hundred million!]

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.

Chi Zhao binds with the slag shou system, and if he succeeds in his missions, he will be rewarded.

But who said life is easy!

A rich old man who was slagged by him: “I know you love me. Your past pains, I’ve already investigated them.”

The star admiral who had been slagged by him: “Don’t be reluctant anymore! I’ve always known that you didn’t betray me.”

The entertainment mogul who was slagged by him: “Don’t make any noise. Honey, will you come home with me?”

The dark sentinel who was slagged by him: “Now, do you still want to say that it is not my child?”

The prince regent who was slagged by him said, “The mountains and rivers are yours, but you are mine.”

…

Chi Zhao burst into tears: “Boss, believe me just this once. Let me get the reward, okay?”

Thinking that the acting is very good, in fact, every day he’s spreading meng.

- Description from Novelupdates