Cassare Dragons are known for their magic-deadening abilities. Though not a conscious ability, a large field surrounds the dragon through which magic is passively nullified. This field is strongest near the dragon itself, and falls off with distance. The absence of magic often makes other creatures avoid them, though some will have the opposite reaction and seek refuge instead. It has also caused them to be hunted, as though the field is severely weakened once dead, their bones and scales retain some of the effect. Possessing such an item is considered a necessity by those who expect to face hostile magic.

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.

The area around Jasom's cave is a maze of timber and metal scraps, with many teetering structures that seem ready to collapse if breathed on. He has dreams of being an inventor, creating devices that replace or even improve upon magi dragon spells, but he's sabotaged by his own lack of focus. The end result, if it doesn't collapse under its own weight, is so cluttered with wires, dials, and shiny scraps of metal that not even Jasom can always remember what it was supposed to be. Qwyllib spirits away a few of the more spectacular (and stable) sculptures to sell as abstract art, and so far Jasom has never seemed to notice anything is missing.