This is a custom-designed balisong, commonly known as a butterfly knife. The defining characteristic of this weapon is the fan-like opening of a freely pivoting blade, allowing rapid deployment or concealment. As a result, butterfly knives are outlawed in many countries.
It has been given a forced patina using lemon and mustard dripped onto the surface.If you think it's messy now, wait until you see it under a blacklight

This item only drops in states between 0% and 100% (Factory New to Battle-Scarred).