Nebula Dragons are nocturnal creatures. With the best eyesight to be found, they are often seen staring into space. Each dragon tends to observe a particular nebula and will eventually change their colors and patterns to match it. As the nebula changes over time, the dragon changes with it. The more intricate the design of the nebula, the better chance an individual has of attracting a mate. It is said that the markings on no two Nebula Dragons will be exactly the same.

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 dragon is spoken of in an old legend that has recently seen a resurgence in popularity. The myth states that this green Nebula Dragon can be summoned only on cloudy nights, if one looks at their reflection in the river and says "Egg Tuna Salad" three times. If the ritual is performed correctly, this dragon will appear, and offer the summoner some egg-and-tuna salad. Supposedly, anyone who takes even a nibble of the salad disappears in an instant, never to be seen again. Due to the bizarre nature of the legend, adults have generally regarded this story as a joke. However, a few young hatchlings that have snuck out of their nest in the middle of the night, presumably to summon Egg Tuna Salad, have never returned. It's possible they fell into the river and were carried away by the current, but some still suspect it's the Nebula's evildoing.