100th Millennium Wiki

Casoria is an ocean planet located in the Xenessi System of Via Aylathiya's Verpletter region. Almost all of the planet is covered by water, with only a few islands poking out above sea level. Casoria is home to the Casorians, a hyper-intelligent cephalopod species that are members of the Commune Federation.


Casoria is a moderately-sized planet that is almost entirely covered by an ocean known as the Casoria Sea. Only a few islands exist on the planet, the largest of which are located in the northern hemisphere and a few scattered islands along the equator. The world is otherwise very tropical, with small jungles growing on the islands.

Under the waves, there are hundreds of thousands of special canyonways, passages, and trenches which are inhabited by the Casorians. Many of these trenches are lit up permanently, home to the cities of Casoria's underwater civilization.

Living in tandem with natural life of their world, the Casorians have ensured that there are plenty of coral reefs that still bloom constantly. The Casoria Sea is constantly teeming with fish and other lifeforms, which the Casorians can then consume as part of their pescetarian diets.

Offworld Colonies

Since joining the Commune Federation, the Casorians have allowed other species to settle on the sparse number of islands on their world. These islands fall under the overall Casorian Commune, but they have set up their own personal communes, allowing them to live their lives and democratically elect their own rules within their settlements themselves.


Casoria possesses only asteroids caught into orbit around it as moons. These three "moons" are Isencer, Kyonsera, and Viveinax. They are all named after renowned Casorian intellectuals and philosophers.


Isencer was the first moon that the Casorians sent probes to and was eventually one that they attempted to settle as an experiment with the help of the Commune Federation. The asteroid is now full of complexes and facilities, all of which are flooded to provide a suitable environment for the Casorians. The facility is now used as both a research facility by the Casorians as well as a forward communications base, letting them keep in easier contact with the wider Federation.

Lessons learned from Isencer taught the Casorians that colonizing in the same manner that air-breathers do was not a good idea. It takes far more effort to terraform a world into one suitable for their needs. This is what lead them to appeal to species who have already colonized worlds for their rights to co-inhabit them. Isencer is now considered a location that Casorians should visit at least once in their lives due to its cultural significance to them. Roughly 500,000 Casorians live on Isencer.


Kyonsera is an asteroid that the Federation colonized with permission from the Casorians. It handles trade relations with the Casorian Commune, taking inventory and redistributing it as needed. The asteroid is covered in a series of habitat domes, with buildings that breach the domes and stretch out into space. Around six million sapient beings live on Kyonsera.


Viveinax is home to an industrial complex for the other species that inhabit the Xenessi System. Due to the asteroid's properties making it uninhabitable by Casorians, they allow other species to settle on Viveinax with their permission. Viveinax is a forge for processing the various materials that are mined from elsewhere in the system. Viveinax is an industrial power throughout much of the system, with many goods and materials coming from it. It is also responsible for the construction of many space stations and space cities throughout the system, many of which are inhabited by the Casorians themselves.