Cultivation: Start From Simplifying Martial Arts Techniques - Chapter 19: Bargaining

In a modern world where cultivators need a place to cultivate or vent their boredom, there are private businesses that set up instance dungeons with the aid of technology and cultivation magic to enable cultivators to train and commoners to experience the life of cultivation. They are called dungeon suppliers.
Xie Jin's one and only dream was to be a dungeon supplier and when his only relative passed away, the relative's inheritance gave him a plot of land and surprisingly, a 'System' Module which the relative had previously used.
With the help of the system, Xie Jin decided to pursue his dream of becoming the number one dungeon supplier.

There are a total of seven sins, and a revelation is made to a young man named Alex that he is destined to become a demon lord, more especially a demon lord of sin called LUST.

It's not like he can change that and because he always knew something about himself was different—not in a physical sense, well, maybe a little—and not in a mental sense—but rather because he is thrown into a demonic war that compels him to accept his new reality.

He was only aware of a difference in himself. Relating to him and the ladies who are drawn to him... Well, it was more or less like he was a magnet in front of all the girls, and all the girls were drawn to him like a metal.

She, the “godly doctor” of an assassin organization in 21st century, transmigrated into the body of Yun Family’s abandoned, good-for-nothing Ninth Miss. Good-for-nothing? Then she’ll let the world see what a real good-for-nothing looks like. Summoners are legendary? Nothing is impossible in this world! She’ll become the first Magical Summoner.

Name: [Art Tavel (Zhuang Zhou)]

Occupation: [Demon Warlock]

Class: [1]

Bloodline: [Abyss (0.03%), Human (94.97%), Darkness (5%)]

The descendants of the Tavel family, the bloodline of demon warlocks that had declined, had another “dark” bloodline after the arrival of Zhuang Zhou.

With this bloodline, he can summon monsters from the dark world.

The first thing he thought of was not to drive the summons to help fight, but to wonder if the equipment of the dark world would explode after the summons died?

- Description from novelbuddy