Homemade Obsidian Knife

This was for an indie survival game called "Demise" that is still in development. I was give a list of props that were needed and allowed to choose what to create. I decided that a "Primitive Stone Knife" sounded like a fun project. After some thought on how to go about designing the weapon, I decided to do a Karambit made with a sliver of Obsidian, with a handle wrapped in cloth or leather and a keyring taped to it.