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.

Wei lu is a very strict dragon and has even been described as being a sadist by several members of his clan. Compounded with this is his belief that pain is an effective form of communication, which he employed whenever he carries out his duties of torture and interrogation. Wei is a master of interrogation, and has the ability to subject people and dragons to great suffering without ever using physical torture. His interrogation skills rely mostly on his ability to torture the mind. He has complete knowledge of psychology. Wei also seems to be immune to others manipulations and can even detect when someone is attempting to. Wei interrogates dragons and people who might appear to be a threat towards his clan. Because Wei has such acute hearing and sense of touch in the earth he is buried in, Wei has the ability to perceive others lies by their heart rate. Wei won't use his sadistic manners for selfish reasons.