The equipment of Spy, as seen so far · 12:00am Jun 24th, 2014
So, instead of a comment, it's a blog post. It would have been a really big comment, so I felt this was better.
Knives;
Your Eternal Reward - Takes form of any being backstabbed by the blade. Prevents other forms of disguise while is Spy's possession. Shows the total number of kills Spy possess. The change of form is instant, with no lightspeed delay. No body is left behind after being killed by this knife.