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.

Brygdylla is a tricky and hard to understand Cave Lurker female. She's silent and still, never moving but watching everything intensely. Most of the other dragons don't like her because of her constant watching and they avoid her nest. Brygdylla rarely seems to move and her expression is always blank, so what she's thinking of remains unknown to all. Brygdylla shows little interest in the two Cave Lurker hatchlings and just stays to herself, hiding her secrets within herself and never revealing a thing.