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.

Dyero isn't a gentle dragon, or a very emotional one. He has a very stimulating vocabulary of grunts, eye rolls and sarcasm that has only been half deciphered by his clan mates, yet somehow you always know when he's dealt you a witty insult. Naturally, you could guess that he's not the most social life form around and that he only has a few friends. Although he doesn't have many friends, the ones he DOES have are extremely loyal somehow. It's still a mystery to the cave how Dyero can possibly keep a friendship with Javirasho, the party boy of the cave.