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21 volumes / 517 Chapters (ongoing)
“He was a book.
He was a book of scriptures.”
His cover was made of the skin of those who hold a grudge against humans.
His words were written with the blood of those who hold a grudge against heaven.
His weave was created from the sinews of those who hold a grudge against earth.
The heavenly demon, the ruler of darkness.
Yeon Sang-hyeon, who signed a contract with the ruler of darkness at the last moment of his days, is now rewriting his own destiny.
The Heavenly genius met The Heavenly demon!