Originating from a single species that thrived in ancient times, Xenowyrms have become an incredibly diverse breed whose appearances vary depending on their habitats. Each Xenowyrm subspecies is heavily reliant on the power of different types of mana, making them powerful magic users. Astrapi are easily the most temperamental of all Xenowyrm subspecies. Their unpredictable behavior—coupled with their masterful control of lightning magic—has the potential for devastating results. Most of their time is spent airborne, flying through the skies or circling mountainsides for prey.

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.

Easily angered and always hungry, Fellwetr is known for her dominance of the Elfein Range, a group of mountains near Valkemare's poles. These mountains are among the coldest locations on the planet, and in them, Fellwetr finds her favorite prey: giant woolly stags. These animals are huge, standing at the size of two Red Dragons at the shoulder, and Fellwetr takes much delight in chasing them down and sinking her teeth into their flesh on the mountainside rock. When they are too fast to chase, she uses massive bolts of lightning to fry and cook them on the spot, happily digging in after. Fellwetr since has developed a taste for cooked flesh in the millennia she has been using this technique.