A genetically engineered self-defense tool, stunsnakes are a combination of electric eels and vipers. They have a viper's fangs made of a copper alloy. When they bite, their fangs create a circuit with their target's flesh, working like a stungun. A stungun that will automatically attack movement, penetrate light armor with their metal fangs, and wrap themselves around a target so that it can't escape. Stunsnakes are thicker and shorter than ordinary snakes, with shiny black skin.
Where it comes from: Stunsnakes are the flagship product of biotech company Practibeasts. The company ultimately went out of business, but not before they produced a run of ten thousand stunsnakes, which have found their way all over the world.
What it wants: Stunsnakes are engineered to be as easy to care for as possible. They spend most of their time in a light doze, from which they can wake at a moment's notice.
What it needs: Stunsnakes are obligate electrovores. They need electricity not only to shock their targets, but to live. Providing them with a sufficient charge is easy: their tails plug into any standard AC outlet.
What it will fight for: Stunsnakes will attack any movement. Familiarizing them with your smell is necessary to prevent them from attacking you.
What happens if you eat it: Stunsnake skin contains layers of rubber, and is inedible. Stunsnake flesh, if it carries a charge, will shock your mouth as you chew. If uncharged, it tastes like bland fish.
What can be crafted out of it: The electrocytes of a Stunsnake, if removed correctly, can be used by any bio-fabricator with a fuzzy logic module to make batteries. The skin is a great electrical insulator, and can be made into protective gloves or shoes.