Stone Dragons have a tough outer covering made of a stone-like material. They eat rocks, using the minerals they contain for nourishment and to keep up their stone outer shell. They rarely move, and are the heaviest of all types of dragons. Although they have wings, indicating flight ability, no one has ever seen a stone dragon flying.

Dragons are highly-intelligent reptilian creatures that—from a human perspective, at least—appear to live forever. Many different varieties of dragon exist, each with their own unique qualities, habitats, and behavior. Adolescence in dragons is usually marked by the growth of a hatchling’s wings, although not all breeds of dragons grow wings and some breeds have other traits that indicate the beginning of maturation. In Galsreim, dragons and humans coexist peacefully.

Having a Magma Dragon as a mother, Battery has a much more fiery temperament than most of his other relatives. But like them he inherited the knack of coming up with simple but effective solutions. When his half-brother complained of never being able to see his mother, a Deep Sea Dragon, as he'd be too heavy to come up to the surface again if he dived into the water (and you can't really have a good conversation while holding your breath), Battery asked a Storm Dragon to kindly create a cold front and used blocks of ice to build a temporary aquarium. After filling it with water, the Deep Sea Dragon could now be above ground and still remain fully immersed in water, and mother and son met face to face for the first time.

By now, his "meet your aquatic relatives" business has become such a success that he could eat diamonds all day, but they taste rather bland so he sticks with tasty granite. But beware, whoever tries to steal his business idea might eat granite too—involuntarily.