Serrati Wyverns are a fierce breed of dragon typically found in volcanic areas or in desert scrubland. With their keen vision, these fearsome predators can pick out well-camouflauged prey from the slightest movement. They are named for the double rows of serrated teeth that line their beaks, which allow these wyverns to maintain an unbreakable grip on prey while they tear into their target with deadly hooked claws. Though these dragons are combative with nearly everything, they are surprisingly well-mannered when raising their offspring in communal nests. Males, however, tend to be chased off as soon as eggs are laid.

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.

The Arena started as an informal sporting event between dragons in Sevra's cave, a way to prove their worth against each other. It has since turned into a rather large ordeal—the winner receiving the best prey, the best nesting area, and bragging rights. A new Champion is crowned each month on the day of the main event: the Bloodmoon. Smaller battles take place weekly to help determine who will actually participate in the main event, though winning these battles is not as great a feat as winning the Bloodmoon itself. The winners are called the Dryear-mitore, meaning "Champions of the Moon".

Bregien is, by far, the most terrifying Champion the Arena has ever seen. One on one fights with this Gold rank Seragamma usually end in fatality or crippling wounds, despite the best efforts of the Arena referees. She shows absolutely no remorse for her actions, claiming that if you enter the Arena, you forfeit your right to live.