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.

Jethro displays his Vine heritage very well. He is a dragon of pure cruelty, and enjoys to tear apart anyone who dares come close to him. He prefers to live completely underground, unlike most vines who stick their heads or full bodies from the ground. The strange color of his flowers comes from the rich ground he lets his victims rot on after he eats them.

It would be very wise to steer clear of Jethro, however, he seems to have taken residence on a major road leading to Helix's, his owner's, property. There is one weakness Jethro has though, he must go to sleep. He is asleep for most of the night, but he is active for almost all of the day.

It is maddening to pin the source of Jethro's (forgive the pun) madness. Some say it was some major inbreeding in the farthest lines of his enormous linage, others say it was some of his ancestors—fearsome dragons known for brutality and their insanity.