What was the use of the incomplete scroll of the Heavenly Book in the Immortal Slaying?

The Heavenly Book Fragment in Celestial Bane was a fictional item in the novel Celestial Bane and did not exist in the real world. In the novel, the Heavenly Book Fragment was regarded as an extremely precious divine book with extraordinary power and ability. According to legend, this book once belonged to a cultivator named Xiao Ding. He accidentally destroyed it while cultivating the immortal ascension technique. Later, it was saved and preserved by a woman named Bi Yao. In the novel, Bi Yao used the power of the incomplete scroll of the Heavenly Book in the Immortal Slaying to help herself and Xiao Ding achieve ascension. Other than the plot in the novel, the incomplete scroll of the heavenly book in Celestial Bane did not have any practical application in reality. Therefore, its role can only be played by the imagination of the author. It can be used to describe the plot and characters in the novel, and it can also be used as a fictional element to add mystery and attraction to the story.