Dark green dragons, once they mature, appear to become an entirely different species. However, this isn’t true. Rather, they burrow underground and get nutrients from their vines. These vines are sometimes referred to as Dragon Grass. These dragons are very violent, and will use their vines to capture, kill, and eat anything that moves, as well as nearby plants. Luckily, their range is limited and they cannot use magic. Dark green dragons tend to be easy to spot since they usually kill all plants around them and thus are usually surrounded by a large clearing.

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.

Feralos defends the island from underground. When a nebula dragon spots a particularly tough enemy, it will tell Feralos and the other dark green dragons who will then use their vines to drag the enemy underground, kill it, and go into a feeding frenzy. Feralos was given is name because of his feral behavior toward pretty much everything, but now he knows when and when not to let the violent attitude all dark greens have get the best of him. Now other dragons can be around him without the fear of being a victim of a dark green's normally mindless assault.