Cai’er’s attack could indeed not pierce through the middle-aged knight’s armor, but it only failed by a very small margin. The middle-aged knight got to clearly sense a cold sensation of great danger and deathly stillness.
If he hadn’t immediately poured his spiritual energy into his energy channels, this would have directly affected his fighting ability.
Cai’er’s presence just gave him too great a pressure: this was the first time he had ever gotten to sense such a material killing intent from an assassin. Thus, he immediately used the technique he was the most proficient at using.
