It’s an undead baby dragon, produced by a failed magical spell. It probably would be cute if it weren’t partially decayed.

Young dragons are relatively defenseless. They are born with relatively soft scales, which are shed and replaced with harder ones as the hatchling matures. Once a hatchling’s wings grow in, it typically marks the beginning of maturation. At this point they are often capable of hunting on their own and are usually left alone by their mother.

Dead of Night never had the chance to grow up. The other hatchlings avoid him, throwing stones if he gets too close. To the adults he is an uncomfortable reminder of what could happen to their own hatchlings if they are not vigilant. They find it easier to forget he exists. So he spends his time on the fringes of the cave watching as those that should care for him ... don't.