Hellfire Wyverns are so named for their foul tempers and fiery visages. Their social structure places all females above all males, due to superior physical characteristics and violent dispositions. Forced subservience of the males causes them to become vicious, petty, antisocial, and passive-aggressive compared to the aggressive and social females. However, orphaned hatchlings raised by foster parents of another species can develop surprisingly even tempers and mellow dispositions, proving that their defining unpleasant nature is, in fact, a learned behavior.

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.

Merlin's Hellfire.  A dragon tainted by magic and potions that have seeped into wings and tail throughout the years, wearing down the wing's edges and tinting them vibrant shades of green and purple.  Her originally white fire has become magical and green, gaining helpful, as well as harmful, qualities.  Forced to live in the depths of a dungeon, she has become a nasty, hot-headed ball of rage, and a force to be reckoned with.