An almost strictly nocturnal breed, Ciriax Lindwyrms are especially attuned to the moons’ cycles. They spend nights patrolling the edges of their territory, aggressively fending off intruders while they feast on their prey. After two or three nights of feeding, often around the time of at least one full moon, Ciriax Lindwyrms retreat to the recesses of their cave or underground homes. These dragons make it particularly difficult to travel on nights that are well-lit by moonlight, often to an unsuspecting adventurer’s dismay.

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.

Unlike Ext3h and TJ09, TJ09 and Ext3h are more gentle and peaceful. They don't know why their owner named them similarly, just as they can't understand why Ext3h and TJ09 argue about everything.

TJ09 and Ext3h are twins. They not only physically resemble each other, but also in personality, which is enough to confuse other dragons who are not so familiar with them. They found this out by chance and immediately fall on it. They temporarily switch their identities to amuse newbies, which makes those newbies dizzy and have no idea which is which. When TJ09 is called, Ext3h replies instead of her and vice versa. As time passes, the community tends to shout out 'TJ09 and Ext3h' rather than address them individually.

To separate them, there is only one method: ask them whether male Ext3h or male TJ09 is cleverer. An Autumn seasonal, who is in charge of the whole cave, pointed out, "the one who answers TJ09 is Ext3h while the one who answers Ext3h must be TJ09."