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.

Brimsternum likes Moltarrow for being such a messy eater—it means a lot of leftovers for him. She thinks that she is exerting her dominance by throwing her (surprisingly meaty) waste bones into the lake and making him fish them out later for her entertainment—of course, before she invaded and "conquered" his territory, he had to drag his carcasses all the way there himself. He enjoys pretending to whine and complain, unintentionally making Moltarrow believe she really is torturing him, and being a hellfire that makes her feel really good. It is an impressively happy relationship on both sides, given their breeds.