Jujutsu Kaisen: I Can Travel Back in Time - Chapter 5 Why hasn’t this world invented a copying machine?

In the turbulent era, the world was under the reign of cunning careerists. A young man named Mu Feng grew up in numerous battles and unceasingly made earnest efforts to stand on his own feet.

His father was murdered, and two hundred thousand of his people were slaughtered. Mu Feng accidently obtained the Sacred Book of Asura, and then he embarked on his journey of revenge with fierceness and blood!

Killing and blood proved his love for family and his people!

He was the almighty Asura!

- Description from Novelupdates

In ancient times, there existed giant spirits capable of supporting the heavens. With bodies as enormous as stars, they soared across the universe. Great clan leaders with mysterious blood running through their veins shattered the void and created new worlds. Ancient Qi Warriors crossed a river of stars to enlighten numerous mortal beings. For unknown reasons, an era silently came to an end, all realms were separated, ancient giant spirits disappeared one after another. Thousands of years later, young Nie Tian managed to travel back into ancient times with the help of a drop of blood…

The first phase of the tiran impact lasted for a whole day. Asteroids falling into earth, releasing and spreading strange green gases into the air. This has mutated or should I say, Zombified humans who were infected, Mutated monsters, and alerted alien races about the existence of earth.Those who survived for 24 hours recieved a chance to survive what was to come as that wasn't the end.Dexter was always a person who didn't care about the world. However, becoming a vampire in the apocalypse was something that he never anticipated. But it was a must if he wanted to leave his hiding spot which was surrounded by monster zombies.While restraining himself from giving into his urges to drink blood, he struggles to keep his sanity intact.Time and time again he refuses to become a lawless bloodsucker.Well, he would rise, facing different adversaries and foes, developing from the once weak and feeble human, into a vampire god....Make sure to check out this fl book 'Disguised as a boy to attend Belmont High School'.

The youngest Wiseman of the continent, Chu Tian, has traveled 30,000 years back in time to the age of antiquity due to an accident.

This is a prosperous era. Rare herbs, minerals, treasure relics and monsters can be easily found throughout the land.

However, this is also an undeveloped era. Communications, traffic, martial arts and technology are in its early stage of development. Prosperous cities lack lighting while its citizens are uneducated.

Our decisive MC using his future knowledge creates Magic powered light bulbs, magic powered telephones, magic powered cannons, magic powered computers, artificial intelligence, psyche internet. 30,000 years worth of knowledge allows him to create miracles and shine brightly in this era. Allowing him to conquer the land and sit firmly on the throne of the 10 realms.

- Description from Novelupdates