Originating from a single species that thrived in ancient times, Xenowyrms have become an incredibly diverse breed whose appearances vary depending on their habitats. Each Xenowyrm subspecies is heavily reliant on the power of different types of mana, making them powerful magic users. Chronos are often considered to be the most elusive of all Xenowyrm subspecies: they live in the darkest and densest forests, far from civilization. They are masters of time magic, allowing them to manipulate the flow of time at will. It is said that Chrono lairs are protected by a field of magic that makes the minutes tick by at a slow pace for any unwanted visitors.

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.

Years ago, a powerful archmage created a Rainbow Mana stone. Since the effort involved left him too weak to live, his reasons for creating the Rainbow Mana stone remain a mystery. Before he died, the archmage trusted the Rainbow Mana Stone to a group of Xenoworms, instructing them to ensure it would never be discovered. The Xenoworms brought the Rainbow Mana stone into a hidden room beneath a cave, the same cave occupied by Hornrim. While he has no knowledge of their presence, the Rainbow Mana stone powers the crystals that grow in his cave. Chronoxeno is a natural clairvoyant and often gets flashes of possible future events. Because of these visions, she saw the need to place the hidden room that held the Rainbow Mana stone in a pocket dimension that's a few seconds out of sync with the rest of the world. Because of this action, only a dragon with very strong magic can find the hidden room, which Chronoxeno believes will ensure the Rainbow Mana stone will remain safe.