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

"This…" Sword Saint Xing fell silent.

He found his son's conjecture to be very plausible too.

If the Otherworldly Demonic Tribe truly wanted to take down mankind, there was no reason for them to disperse their forces across 108 Subterranean Galleries. The dispersion of forces would make it much more troublesome for mankind to cope with their assault, but it would hinder them from launching a decisive assault either.

It would have been much more efficient if they had just focused their forces on a couple of Subterranean Galleries. Had they resorted to concentrated, surprise attacks on a couple of the more loosely guarded Subterranean Galleries, their chances of success would have been much higher.

Venturing Alone