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.

This cavern lurker was raised by the human version of a vampire, whose lack of creativity led to him being named Cavern Lurker. He was trained to hunt for humans and to supply the blood-sucking community in Swouthest. The job was simple: catch a human, drain off the blood for the vampires, then "dispose of" (eat) the body. He eventually slew the vampire who hoped to enslave him and took over the business of supplying vampires with blood. To reinforce his freedom, he changed his name to Abo—or, more precisely, A AB B 0, for the blood types he has found in the humans he preys on. He has learned to distinguish between the types by taste as easily as the vampires whom he supplies.