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.

Tenacio is rather more easygoing and patient than many other Vine dragons. He loves his life-mate Marcella dearly, but worries that her health may be delicate because they have only been able to produce one egg at a time, rather than large clutches of eggs like most of the other dragons at thevinyard. His concerns about Marcella's health are balanced by his satisfaction that all of Marcella's children have been able to stay at thevinyard, and not sent to be fostered at other caves or banished to the Wilderness.