Cavern Lurker Dragons are nocturnal ambush predators. Although small, they are very aggressive and will attack anything weak enough to be overpowered. Their preferred method of hunting is to lie in wait in a cave, burrow, or other small, enclosed space; when any potential prey passes they will lunge out to grab hold of the unsuspecting victim and drag it back into the lair. Cavern Lurkers have an odd aversion to sunlight and almost never venture out during the day. More commonly sighted are the odd piles of bones they stack near the entrance to their dens. Their mating call is a low-pitched bumping noise.

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 dark egg on a dark night, that's what Kaini came across on one hallows eve... and it grew into Mistake. Mistake is the impromptu leader of the cave lurkers in Kaini's clan, and he tries to exert that leadership on the other halloween dragons as well. He has very little luck with the shadow walkers: they simply avoid him, but some of the marrows flocked to him; the ones that grew up during his same year. Kai let him make his little 'gang', assuming he'd behave rather than end up in trouble in the end...