Supreme Harem God System - Chapter 1986 Deal with the Devil.

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

One day, Luo Jian woke up from his sleep and found himself in a locked chamber where the door and window were all sealed. A note with a few lines written on it was tacked to the wall: “Escape from this room within an hour, otherwise, you will die.”

There is a sequel called Reincarnation Night (轮回之夜) that takes place in the same universe but has different main characters

- Description from Novelupdates

Yun Ran, mercenary queen of the apocalyptic world unexpectedly transmigrated into the ugly, stupid second lady of the Prime Minister’s mansion with two little adorable three-year-old kids. Adorable baby 1 was a genius poison doctor who had a photographic memory and was “unremarkable”.Adorable baby 2 awakened the ultimate spiritual root that only appeared once every thousand years. When he pounds the ground with his small fist, the ground would shake. As for her, she had a spatial pocket with treasures in it. She contracted an ancient divine beast and refined peerless divine pills!***

Just as Yun Ran was gearing up to experience the joy of beating up scumbags…Can someone tell her why these few bigshots suddenly appeared before her?! The top tyrant: “I have a throne that you should inherit when you have the time.” The cold-blooded war god: “I think you have the talent to be a great general. Look at the millions of soldiers I have…” The best royal merchant: “Come, I’ll let you taste the joy of being the richest woman in the world.” Sinister state preceptor: “I’ll stab and curse whoever bullies you.” A certain ghost king traps her in his arms and snorts coldly, “Close the door and release the demons. No one should even think of coveting my treasure.” Yun Ran: “???”***

Rumor has it that the ghost king, Mo Beiyuan, has a pair of ghostly eyes. He was born under the destructive lone star, was bad towards women and was the most messed up character in all five countries. Yun Ran not only messed with him, but also wormed her way into his heart.#He was once a demon in the darkness, but he was willing to step out of the abyss of hell for her.#

A young man finally managed to become an immortal, a powerful cultivator able to lord over millions of souls. He took advantage of his tremendous luck and fortune to become the youngest immortal in history. He now wants to create his own sect and enjoy life, one filled with female disciples!