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If it hadn't been for Shinju Rina entangling the Knife-witch at Beichuan Si, it would have been a difficult matter for them to break free.
That Knife-witch had to be at least a medium-level resentful spirit, powerfully and agilely manipulating the noble knives filled with grudge; dozens of torture blades which Jian Ding couldn't simply break through created an almost unbreakably rigid Spiritual Body.
Moreover, it possessed terrifying speed and extraordinary sensitivity.
Given Beichuan Si's current abilities, overcoming the opponent would be extremely difficult.
The identity of the Knife-witch still remained a mystery.
Was she a "Concubine" or one of the Soul Suppressing Twins called "Shenzhu Zhong"?
Personally, Beichuan Si tended more towards "Shenzhu Zhong".