Heartstealing Dragons are an unusual breed, named for their mating rituals. These dragons use their long, slender bodies to sneak into both human and dragon holds to steal things over the year. Then, when the right season hits, they give away their entire hoard as gifts, leaving things in the homes of other dragons to attract them. When these gifts are found, however, the recipients can’t always tell who gave the gifts. This receiver often assumes the source of the gift was the original owner, causing them to form friendly bonds with other dragons in the area, spreading peace—and sometimes even sparking love. The only way to know if a gift is from a Heartstealing Dragon is to find one of their wafer-thin scales at the scene.

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.

Nicknamed "Crys", this creature befriended a male unicorn wizard whose name was never known to her. Their friendship began when he offered a heart-shaped, diamond relic for her to protect from other, greedy equines who wanted it for themselves. Unlike a regular crystal, it could store feelings of love and harmony and spread those feelings to any nearby living things. In return for protecting the artifact, Crys could keep it with her and travel the land to spread happiness wherever she went. However, when the mating season for her breed began, she had already forgotten her task and gave it away to another dragon. She spotted it again one day on display near a small kingdom's castle and decided that it was best to leave it alone, as it wasn't causing any trouble.