My Killing System

Can you become stronger by killing people? Is there such a good thing? The last time I encountered such a good thing was in the game. At that time, I was unparalleled in my attack and killing indiscriminately. I couldn't kill the opponent. I was so angry that I even wanted to kill my own teammates. So I asked you, are you afraid? Are you afraid? Ahem, the world is so beautiful, but I am so irritable, this is not good, this is not good. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.