MTL - Cultivating to Become a Great Celestial - Chapter 23 : Old Slipper

The top-tier professional player Lis woke up to find himself having crossed into the “Divine Revelation” game, becoming a Viscount enamored with magic. Knowing that he would soon face a continent engulfed in war smoke, grand otherworld expeditions, the mysterious decay of the World Tree, and the constant threat of Abyss Demon invasions... Lis admitted he was a bit panicked. ...... Fortunately, the game system was still in place, and he still possessed the “All-Purpose” Talent. With the memories of his past life, he switched his class to Arcanist, analyzed the Element Model, reshaped the world’s rules, and step by step ascended to that supreme throne. ...... Players complained about him, “This boss is too perverted, he can even grow stronger, we protest!” Elves worshiped him, “Lord Lis is the strongest Divine Favored, he has brought peace to the world.” Mages praised him, “He is the pioneer of magic, as well as the Guardian. His revered name is Lis Kane, He is the god of the arcane.”

Another entry in what you can call the Proto Harem Series: the books written before the Harem Series that take place in the same world.

It’s about a swordswoman whose student is captured, so she goes to rescue her.

In order to chase down and kill her own murderer, Xia Yichu reached an agreement with the 233 system, and she will travel through the world to complete the task, and The 233 system helped her return to the original world.
However, Xia Yichu often encountered a broken BOSS while he was on his way to do the task. He did n’t agree with each other on the wall, the bed, the various patterns, and kept talking.
System: Please use one word to describe the other person’s impression in your heart.
Xia Yichu: Competent.
Shen Jiaye: Mine.

- Description from 69shu