I have a really good idea for a spy knife but I have no idea how to make it, so I'm wondering if you'll take it on.

The base idea is that it's a multi tool that changes every time you back stab there would be a normal knife, a wine bottle opener that would give a speed boost while held, a fondue fork, a screwdriver, a steak knife that will give the bleeding effect if it's not a back stab, and a pair of small scissors and if you're wondering what it's called this weapons name is "the switching blade."