Shadow Walkers are a strange breed that possess the ability to slip between the planes of reality, becoming immaterial. This allows them to hide in the shadows, either hunting from the concealment of near invisibility or evading enemies. Though they become corporeal to mate or to eat, they spend most of the rest of their lives walking in the shadows. Shadow Walkers are wary creatures, though on dark autumn evenings when the leaves fall to swirl in the chill, rain damp air, they may be seen drifting out from the shadows.

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.

Oilspill's name is to blame for the quirks of another Shadow Walker who has been nicknamed 'Pen', but the relations end after that. Oilspill is a bit clumsy, and got his name when he messed up his intangibility. He was fooling around near some barrels phasing in and out of them as he pleased, when he accidentally turned solid within one; half in it and half out. Said barrel contained oil, and instead of causing him fatal injury, it simply broke the barrel. The oil spilled all over and left this young dragon completely embarrassed. He's been called Oilspill ever since.