You may use Cogs. I don't have his info up on this site, so I'll describe him here.
Cogs is a more-than-slightly insane sadistic knife specialist. He has a black saddlebag containing exactly 100 knives and one wrench (could be replaced with another object). Each of the knives has a different power, and he has to draw them at random. The wrench/object of your choice is the 101st object, and he draws it only when death is near. It heals his wounds and causes him to be able to wield all of his knives' powers while it is out. However, in this state, if he is damaged AT ALL, he is killed.
NOTE: Cogs is a batpony. Here's a picture: