Black Marrows are named for their dark colored hides which are encased in a distinct exoskeleton. Their skull and the top edges of their spine push out from under the skin as they age. As such, their young need excessive amounts of calcium for this armor to develop. The older a Black Marrow dragon is, the more skeletal their appearance. They often use their skeletal looks to lure in foolish scavengers or terrify predators. These vicious dragons love nothing more than to crack open bones with their stony beaks and eat the marrow inside. Voracious scavengers, Black Marrows will swarm and devour corpses both old and fresh, sometimes even dragging larger finds to the water to allow them to “ripen.” Despite their dreadful demeanour and often horrid stench, Black Marrows are devoted mates and parents.

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.

Medusa is strictly nocturnal and is a very elusive dragon. Her tamer doesn't see her very often, because at night, Medusa will go looking for carrion and will not return until dawn. Medusa doesn't typically hunt, but she will never turn down a fresh kill if presented to her. She seems to like the marrow from larger animals better than smaller ones. Medusa received an exorbitant amount of calcium as a hatchling so her bony protrusions are incredibly strong and prominent. While she isn't the most friendly of dragons, she is very calm and collected, and clearly respects her tamer, even sometimes bringing her dead animals as tribute.