Glystere Wyrms spend most of the year deep in arctic seas. As winter approaches, these dragons will emerge from beneath the ice to congregate midair in search of a mate, where the glitter of mana crystals down their bodies can be seen as they fly across the night sky. Glystere Wyrms are known to take a respite from flying by looping around trees, over homes, or across high-hanging cliff edges while entwined with others of their kind. The colorful light of their mana crystals and the icicles formed down their undersides often leads them to be mistaken for festive decor when at rest. Traveling with friends and families to find the most brilliant display of these wyrms has become a steadfast tradition during the holiday season.

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.

Glister Warm's "winter house" is normally inaccessible owing to the magic and traps set, but when he leaves the sea, the spell is turned off and the traps put away, and the place becomes the most noticeable thing in the landscape. From late November to the end of December, every square prong of his territory's surface area is covered in colorful little lights. It appears he decorates all by himself every year, and the entirety of it occurs in less than a night. While the "house" gets many visitors this time of year to admire the sight, many viewers are understandably curious how he does it. Maybe he has invisible helpers, maybe he "saves up" his magic and hides his fatigue, or maybe he (gasp) ironically employs dark magic to place all the lights. Every year, the extravagant decorations bring in an extravagant tale or two about Glister Warm, though none have amounted to anything beyond silly rumors.