Black Dragons are warriors. They are strong and capable in battles of force, but also ample magic users, capable of devastating opponents with their spells. Their bright eyes give them excellent night vision, which is why they generally hunt during the night.

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.

Rivus is one of the scattered Dolhr dragons, who had been living out a quiet enough life in seclusion until she received a message from an individual operating incognito, instructing a meetup and marked with the Dolhr's sign. She showed up at the designated area—to meet up with Tabo and Cadifor, both leaders under Medeus' command.

Once she had been informed of her new role and had moved to the Dolhr base, Rivus began to put her exiguous resources to use: learning to wrangle exceptionally aggressive beasts. She was training to be the lock holding the key to a secret weapon that, once unleashed, as short-lived as it may end up being, would wreak absolute havoc amongst enemy forces and disorganise them—even lay some to waste.

This weapon, Rivus was told, was kept trapped in a small area of land. A Flamingo Wyvern under the alias of 'Blood Stained Blades', a beast with such lack of a heart, it would rip to shreds friend and foe alike.