Deducing Martial Arts from the Demon-Suppressing Heavenly Prison

In a world where demons are rampant, Mo Qing takes over the responsibility of supervising the demon prison for his father, which is not a bad job. Fortunately, he has a deduction system. Deducing the future through reality. [The deduction is over and the event is unlocked: killing all the people] Deducing martial arts through events. [You have experienced a lot of killings, the anger of revenge fills your heart, you practice sword skills hard just for revenge, and you understand the martial arts: the bloodthirsty magic knife through countless mistakes.] In the sky prison, the fox demon was tortured. [The deduction is over and the event is unlocked: Exhaustion] [You are not willing to lose to the fox demon, practice the method of fierce fighting with all your strength, and understand the inner strength: endless life] I have mastered the eighteen martial arts, and the heaven and the earth have become one nation because of me.