C155 While fighting and retreating

BOOM! Everyone was temporarily blinded by the effects of the lightning. When they regained their vision, they saw Shen Kai's black iron knife slicing down on Mu Chen's right shoulder, the latter staring at Shen Kai with his mouth agape in disbelief. How could this be?

Originally, Shen Kai's attack was aimed straight at Mu Chen's face, if it had hit his head