Split Dragons use their sharp teeth and wings to hunt large animals and rarely eat plants. They are intelligent dragons who enjoy mental challenges, preferably alone; Split Dragons are normally solitary except during mating season. When mating, many dragons come together in a group to raise their eggs and hatchlings. These groups tend to be very noisy—reminiscent of a thunderstorm—and last only until the hatchlings are capable of surviving on their own.

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.

Two-headed dragons are unique enough to deserve a separate classification from ordinary dragons. They have two necks, two brains, two mouths, but one stomach and one main body. The two heads usually work together, but there are times when they will fight each other, snapping back and forth. Their unique anatomy prevents them from breeding with single-headed dragons.

Xix and Ziz can be easily described in one word, boring. The pair prefer to sit around most of the day, and are often mistaken for guards by visiting dragons, as they are always sitting in the cave entrance, unmoving.

When they are talked to, it is rare for them to speak back, and when they do, they often talk at the same time, and the same boring words at the same time. It's always something like "the grass is nice and green today" or "those clouds sure are pretty."

There is a rumor going around that, unlike most two-headed dragons, they only have one brain. Although it isn't true, it seems correct.