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.

Arzur and his sister, Gemina, belong to a warlock who has inhabited this cave. He, infact, owns all vampire, marrows, and halloween dragons all together. But Gemina and Arzur where his first, so they get a special place in his heart.

Arzur is very straight forward and cocky, but also very playful, unlike his serious, calm sister. He is always getting into trouble, and tends to think he is still a hatchling, attempting to either sit on his owner's lap or leap onto his shoulders. He romps with the vampires, since they're the only ones around his size who will deal with him. His owner keeps him away from the hatchlings, which disappoints Arzur, but its for their own safety.