Atlas of Heaven and Earth - Chapter 241: Mutation

In a world of brooding heroes and dark justice, one mercenary stands out—not for his skill, but for his relentless sarcasm and love for chaos. A self-proclaimed anti-hero, he finds himself working with the Titans, much to their frustration. While undeniably skilled in combat and nearly impossible to kill, his real talent lies in driving his teammates insane with endless jokes, fourth-wall breaks, and questionable decision-making. Whether it’s swapping Robin’s gadgets with toy versions, turning serious battles into slapstick comedy, or giving monologues mid-fight, he thrives on pushing everyone’s patience. But beneath the humor, there’s a sharp mind, a tragic past, and a surprising willingness to do what others can’t. While the Titans may roll their eyes at him, they also know that when things get truly dire, he’s the wildcard they need. Love him or hate him—he’s here to stay, and he’s having way too much fun.

Some say reincarnation is a blessing, but for me, it's a dreadful curse. Cursed with endless reincarnation, I've been reborn as a villain 137 times. And all 137 times, I've been toyed with and killed by heroes who are far more cruel than the said villains... If I can't win no matter what I do, then I'll crush those so-called heroes at their very roots. - Quality Fan Translations, Made by Fans for the Fans - Villain Takes Over The Academy

Traversing into another world, Zhang Xuan finds himself becoming an honorable teacher.

Along with his transcension, a mysterious library appears in his mind.

As long as it is something he has seen, regardless of whether it is a human or an object, a book on its weaknesses will be automatically compiled in the library.

Thus, he becomes formidable.

“Emperor Zhuoyang, why do you detest wearing your underwear so much? As an emperor, can’t you pay a little more attention to your image?”

“Fairy Linglong, you can always look for me if you find yourself unable to sleep at night. I am skilled in lullabies!”

“And you, Demon Lord Qiankun! Can you cut down on the garlic? Are you trying to kill me with that stench?”

This is an incredible story about teachers and students, grooming and guiding the greatest experts in the world!

- Description from Novelupdates

The main protagonist Chen He often meets crazy people in his life, and all these people have very deep prejudices against him. They often do weird things.

(1)

Once, Chen He polished off a bunch of hired killers (who seemed to be after him?), and eventually found the mastermind.

Chen He: You and I are complete strangers, so why are you doing this to me?

Mastermind: You’re gonna kill me after ten years! Of course I’ve got to make a preemptive strike.

Chen He: …

(2)

Chen He: Sir, we have had no bad blood between us, and I have not done anything to offend you. Why are you being so threatening?

Taoist priest: Hmph! In the future, you’ll be offending me to no end. Haven’t you been looking down on me all your life?

Chen He: …but I still have my entire life ahead of me!

(3)

Antagonist A: Chen He! Because of your master, I was rejected by XX Sect, and so I was forced to become a demonic cultivator!

Chen He: Who…who are you?

Antagonist B: My future lover’s meridians and good looks were ruined by you, and I’m definitely not gonna let you do it this time!

Chen He could not help but think: There is definitely something wrong with my life!

- Description from Novelupdates