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.

Anas is insane by anyone's standards, but the nature of his insanity is what makes him peculiar. His two heads and their collective control over one body gives off the impression that this one dragon is really composed of three beings. The interaction between the two heads is of particular note; the one covered in Fire mana acts more feminine, while the one covered in Ice mana acts more masculine. At times, it seems that the two heads are attracted to each other, which results in some very strange neck twists and thrashing about as the body attempts to hold itself together through sheer force of will. He wanders through the tunnels under Damian's oasis, lost in his own tortured world.