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 Goldenmage Assembly would seem to be a strange place to find a cassare dragon, and yet three regularly visit it. Oanac lives far enough away to not interfere with the Assembly's magic, but close enough to respond quickly if a spell should go catastrophically wrong, as has happened in the past. Safeguards have improved since the last time a magi with more power than skill blew up a practice room, but Oanac still finds herself nose-to-nose at least once a week with some hapless spellcaster or some young hopeful with more power than they can properly control.