You Start with a Knife, and All the Equipment Depends on Grinding

You start with a knife, and all the equipment depends on grinding. Knife crit**? No, sir, this is too powerful. I can't let anyone live! System: "Oh, let's weaken the damage of the knife." Forget it, let's not weaken it anymore, just stay invincible! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.