After millions of years in the library, I became an Immortal Emperor.

Who says reading is useless? You can even reach the Immortal Emperor realm through reading!
Ding!
You will gain a year's worth of cultivation by reading ten volumes of books!
You will receive one opportunity to perform a kendo deduction exercise!
One chance to gain insight into the origin of destruction!
……
In the vast Xuanhuang World, where countless races coexist and humanity is weak, a young man attains immortality in the library. One day, when all races attack, a sword will emerge from the library, its light chilling the nineteen continents!