You know what's cool? Modifying kitchen knifes into a broken back seax or a knifr (viking knives). "How?" I hear you ask. Well; let's start, shall we?
Seax is a traditional Saxon knife that was also used by vikings in the form of broken back seax.
Disclaimer: You may ruin good knives. This isn't the end of the word. Open up some jazz, light up a cigarette and get in deep thoughts and think about what made you ruin it. I do that.