In Different World with Naruto System (WN) - Chapter 269: Poison

He became a teacher at the best magic academy in the empire.
….For being mistaken for someone else.

A young boy named Chen Zong got lucky and found a mysterious Sword Seal. With the help of it, he rose to be a God in Sword who defeated innumerable top talents in all universes from a remote borderland.

- Description from Novelupdates

David crossed over to a new planet after getting killed on his previous one. This new planet is dangerous and filled with supernatural creatures like monsters and demons. Without enough power to protect yourself, you could get killed at any time.Unfortunately, David only has average talent and struggles to progress on this new planet. After 3 years of trying to become more powerful, he is eventually expelled from his warrior school due to his average talent.Faced with this situation, David doesn't know what to do. He is unsure if he will be able to survive on this planet or protect his family. For 3 years, he has not received any kind of help or advantage that would make his life easier.Ultimately, David almost loses hope and accepts his fate as an average person. However, just when he has given up, he suddenly receives a cheat or “Golden finger” that gives him the chance to become as powerful as the other geniuses on the planet.Will he get the chance to become powerful? On this new planet, he can be killed at any time by supernatural creatures. To learn more about David's journey, continue reading.

The most dependable (sarcastic) assassin -- Gao Xuan.Developing himself with an inventory of powerful gear. A master of biding his time, backstabbing, and brutalizing weaklings.Don’t love me. Nothing would come out of this.I am an assassin without feelings.