What you want is a bayonet. The triangular cross-section makes the wound nearly impossible to heal. Even if they get away, it's almost a certain death.
The reason is that the body heals inward, and wounds that are a straight line heal quickly because the two sides meet. A triangle messes you up and the body has a hard time healing (if at all).
Shank with a triangle.
(I did a lot of research on Civil War weaponry in high school)
- Twas on the Fifth day that the fish and fowl were created.
- On the Sixth day He made man in His image and let him have dominion over the fish of the sea, and the fowl of the air.
- On the Seventh day the Lord rested, and I picked up my rod and gun.