Hubby, Your Fox Fairy Wants Everything - Chapter 164 Back to the Jin City

A man was transported to Ancient China and eventually became a servant of a declining household without a male heir. He utilized his wits and modern knowledge to help the household and eventually become trapped in the sea of political turmoils of the period.

- Description from Novelupdates

Perhaps it is the choice of fate. As a senior otaku, Qian Lingfeng got the “steel shell system”. However, when he swept the world with the system, became a local rich man, made all kinds of beautiful women, opened a harem, and realized the ultimate fantasy of thousands of otaku, he found that things seemed far from simple!
When the end comes, biochemical zombies suddenly come down, fierce beasts are in power, bloodthirsty zerg roam to kill the world, and human lives are comparable to dirt. Where will weak human beings go in this world? Is humanity going to be extinct? Or … can an otaku save the fate of the human race?

- Description from Novelupdates

True evil needs no reason to exist.

“All living creatures must die, but I wont. ”

Once known as the most talented and knowledgeable scholar/philosopher across three continents, he basked in the praise and reverence of those around him. However, tragedy struck one fateful night when he bore witness to the cold-blooded murder of his entire family. Driven to madness, he embarked upon the path of power, the path of negative energy, and thus, The Great Demon, Badur, was born.

In a single day, a mountain of corpses were stacked, many of which fell to his blade. However, during his final pursuit of revenge, he met his untimely demise. His soul was extracted and cast into the void, where it would endure eternal suffering.

However, his jouney would not end here……

“What do you desire?”

A grotesque creature floating in the void asked while staring at the bruised and beaten soul of a young man.

[Ding!! Host has received Void grade Treasure]

[Ding!! Goal has been set : Attain True immortality]

A new lease at life is presented

A deal with a Demon filled with resentment

A new journey, a new Dawn

With that the great Demon, Badur is reborn

ps: the book won't progress the way other novels have been progressing. if you don't like a unique development then maybe this isn't the book for you.

A woman from ancient times falls in love with her soulmate.