Lum

Mirror Domain’s moon is known as Lum, although more often than not its simply referred to as "the moon" and not by its actual name. The vast majority of those who call the moon by its actual name are either Astronomers, who use the name to differentiate Lum from the moons of other planets, or Satyr, who have strong rooted religious beliefs rooted in Lum and don't want to disrespect it. Its name stems from the word "Illumination", as its historically been one of the few light sources in the night hours. Functionally speaking, Mirror Domain’s moon acts nearly identical to that of earths moon. The days are still 24 hours, and Lum still has all the same phases earths moon has. Its more or less the same distance away from Mirror Domain.

Unlike Mirror Domain, Lum is almost entirely comprised of water; save for a few prominent landmasses which some say resemble a rabbit standing up on alert. This has lead to many of tales of "the rabbit in the moon", but more on that later. While Lum's surface is nearly 90% water, most if not all of the surface water is permanently frozen due to the freezing temperatures of space.

The creatures of Mirror Domain have yet to travel to the moon. Even with the aid of magic, the only individual who's ever actually thought about making the trip there is the God Meridian, and even he's yet to conquer Lum. The people of Mirror Domain aren't at a viable point in time technologically or magically to even consider it to be a possibility.

Still, this doesn't prevent people from wondering. The moon Lum has tons of folklore surrounding it. Satyr believe their god, mother wolf, resides on the moon where she spends her days waiting for her pack to return. Many people believe in the aforementioned "Rabbit in the Moon", who shares the same name as the moon itself. The moon rabbit Lum is treated more like a fairy tale than anything else. Its said that, with the aid of a rabbits luck, he was able to climb to the highest peak on mirror domain and use his ears as pseudo wings to fly all the way into space and, eventually, onto the moon. This story came to be around the time Demon Summoning was first discovered, as people theorized that demons were a bad Omen that would eventually dominate Mirror Domain. The tale of Lum is a tale of warning, and its said he flew himself to the moon in order to escape the ever growing population of demons. When the Great demon infestation manifested in year 0, people all over Mirror Domain satirized the story, and nowadays its moral has shifted from that of a warning to that of a ward against cowardice. Before the infestation its said that Lum was able to recolonize the moon and start mortal life over from the beginning, but after the infestation its said that Lum got to the moon only to freeze to death, and that if he'd just have stayed around until the end of the war he would have been able to continue on with his life on Mirror Domain.

While the people of Mirror Domain don't know this, Lum is actually home to a plethora of aquatic life. Several miles below the icy surface is an endless expanse of fresh water. Underwater vents and volcanoes provide the necessary heat needed for life to flourish. All manner of deep sea fish, sharks, and crabs can be found far beneath the ice, remaining perfectly hidden from the prying eyes of Mirror Domain's people.