Fell Dragons are a primitive, fractious breed. They are born small but grow astonishingly quickly throughout their adolescence, and constant hunger inspires them to eat nearly anything that can be made to fit into their mouths. Legend has it that they never completely stop growing at all. Adult Fell Dragons are massive juggernauts: a diet rich in minerals and metals harvested from the earth helps them grow a dense, scaly carapace along their backs and toughens their thick hides, while their wickedly sharp claws and the bony, ax-like crest on their heads are well-suited for both hunting and physical combat. Though few Fell Dragons have crossed paths in the wild due to their primarily solitary nature, it is said that their thunderous disputes can be heard—and felt—for miles around.

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.

There's one human who wholeheartedly believes Fell Through's head would make an excellent slide. At first, Fell Through saw the human as a terrible nuisance and would lumber away, only to be found and bothered again. He also tried several times to toss the human high up with his head and then catch and gulp it down. Even choking and spitting the thing out didn't change its mind about building the slide. Eventually, Fell Through tired of this nonsense and now just goes about his business while mostly pretending the human doesn't exist. Whenever he wakes up and sees that it has begun building stairs and structural supports on his head, he dumps them off. For some reason, nothing Fell Through does seems to deter the creature, but he doesn't think too much about what it's planning because he'd just go mad. Whenever he has the opportunity, he calls the human "it" despite its constant corrections, which seems to be the only thing that irks it.