Nexus Dragons are massive, volatile beasts surging with magical power. Each half of a Nexus Dragon’s body is infused with fire or ice mana, and it is believed that the unstable nature of these paired elements drives the dragon mad as it grows in size and strength. They are strict carnivores, preferring to feed on dragons and other creatures that naturally possess magic in order to bolster their own stores. As Nexus Dragons age, fire and ice mana crystals grow all over their bodies, enhancing both their power and viciousness.

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.

While one would expect the two halves of a Nexus to be opposites constantly at battle with one another, Jack's two halves share one thing in common: curiosity. The ice head loves to analyze details about the world around him, and can be found using his front paw combing the rocks around him to try to get a closer look at nature. The fire head is infused with an adventurer's heart, and longs to see as much of the world as possible, with no time to slow down and focus on the rocks below him. While they bicker about who gets to look at what, their curiosity unites them and fuels their drive to undertake great voyages about their planet to learn as much as they can in their lifetime. They would have quite the stories to tell, if only dragons would stop running away from them in fear of being eaten!