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.

Mulder and Scully are the only surviving member from their original cave (all others perishing between 2008 and 2010). The two-headed dragon refuses to explain exactly what happened during those tragic years, so much of their background remains a mystery. Unmatched in their power and experience, no other dragon presses the issue any further.

Even for a Split dragon, Mulder and Scully are quite unusual; Mulder, the right head, asserts that he is a male despite possessing the characteristics of a female! This confusion has made it impossible for the dragon to breed, as neither head can agree on what gender their mate should be. With no mate, no children, and no surviving family from their original home, Mulder and Scully have become extremely introverted and short-tempered. They make no effort to retain friendships with others and hold their position as broodmother and top dragon with direct authority. This sternness and strength are only put aside when tending to hatchlings and eggs.