After pondering for a moment, Lin Xuan circulated his spiritual power and cast a Great Strength Technique on himself, then grabbed the ancient book with both hands and yanked hard.
The force behind that pull was at least several thousand jin, yet the book did not budge in the slightest. Not even a tiny tear appeared.
"This isn't paper."
"The Young Sect Master is correct. The material used to make this book is not ordinary paper. Mother of Profound Iron was added into it."
"Mother of Profound Iron?"
Lin Xuan's expression changed in shock. Profound iron, in the mortal world, was an incomparably precious thing, capable of forging divine weapons sharp enough to sever hair with a breath. Even in the cultivation world, it was worth a great deal and was one of the important materials used to refine spiritual artifacts.
Profound iron was extremely rare, and as for Mother of Profound Iron, it could only be described as something one might chance upon but never seek.
As everyone knew, cultivators of the Spirit Movement Stage and the Foundation Establishment Realm could use spiritual artifacts. Then what about experts at Core Condensation?
Spiritual artifacts were no longer worth their regard. Instead, they used an even higher-grade item known as a "magic treasure."
The power of a magic treasure could not be spoken of in the same breath as a spiritual artifact, but in all things, where there was advantage, there was also drawback. To bear such great might and divine abilities, the materials needed to refine a magic treasure were naturally incomparably rare.
Among them was Mother of Profound Iron.
Many experts who had entered Core Condensation exhausted a hundred years of effort and searched the five lakes and four seas, yet still found it difficult to obtain even a