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.

A rumor spread throughout the cave that if this dragon's name is said three times, it would appear. A few young dragons thought it would be oh-so-hilarious if they brought one of the "slower" dragons into the woods. The naughty dragons tricked him into saying Betelgeuse three times and insisting that playing dead would bore the beast and cause it to leave when it arrived. No sooner had the unsuspecting dragon uttered the name a third time, a loud irritating cry erupted from the nearby shrubbery. The "slow" dragon fell to the ground to play dead. Betelgeuse Trois believed the dragon was really dead, and viciously attacked him, ripping him to shreds. Today, dragons and humans alike avoid using this dragon's name for fear that they too will be attacked.