Who is the soul of the black dumpling that the devil is fighting?

Xiao Xu. Of course, the most representative novel A Fierce Knife in the Snow belongs to the father of Xu Fengnian, the protagonist in the book, and Xiao Xu, the king of Northern Liang Dynasty, who is known as the "king of human slaughter". This book describes that people slaughtered Xiao Xu and joined the army to kill people when they were 10, killing everything in the south and the north. Fierce Knife in the Snow is a mysterious martial arts novel serialized on Chinese website, which was published by Jiangsu Literature and Art Publishing House on 20 13.