Heng Sao Tian Ya

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. 
"Monarch 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 Monarch 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!
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Millman97

Library of Heaven's Path

StarveCleric

Daoist6fubtiW

Knowing that it was helpless before the other party as long as it was trapped within this book, the finger finally abandoned its pride and spoke. "I am the phalanges of a finger of Vicious, and it is only after several dozen millenniums of sleep that I finally gained my own consciousness. The Bluehorn Dragon Beast was the emperor of the Cloudmist Ridge, and in order to hasten my awakening, I bound his soul to me and had him work under me…"

Soon, it went through the entire story.

It wasn't too far from what Zhang Xuan had guessed previously.

No one could tell for sure what had happened in the battle between Vicious and Kong shi back then, but one thing for sure was that the phalanges of a finger of his had been left behind somehow.

The Wealth of the Golden Beartiger Beast