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.

Lurk is the proud and wily leader of the Black Marrows of SL's scroll. Unlike most other Halloween dragons, Lurk loves attention and will lap it up anytime it comes his way. He'd even do anything to have the spotlight focused on him and would do anything to keep it that way as well.

Lurk is also quite proud of himself, as well as his group. He often struts around the cave, snapping his handsome bone laden head, and bragging about how Black Marrow's bone armor can resist any kind of physical attack. He is the only male Black Marrow so far, and is proud of that, too. He makes sure his dominance is set, and even fights against the females who act up against him. Lurk is suspicious of all males, and makes sure that his females are far away. He'd do anything to protect his group, and often holds vicious fights to the death against opponents twice his size, always coming out as the victor.

Lurk is attracted to the female Tenebrae. He admires her sharp tongue and especially her pretty face.