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.

Duncan the Magic Policeman is one of the few non-falconiform dragons who can call themselves policedragons in the cave. While his magic diminishing aura is less strong than most Cassares, he makes up for it with enthusiasm. When not chasing down magic users demanding to see their magic licenses, he can be found toying with new scientific things and blowing up his den in super explosions. Whenever the building dragons demand that he stop he simply chuckles and says, "It's fine."