This is from a thread I made today, but I liked the planet enough that I'm writing a story about it, and decided that due to the quality of writing I should stick this in my blog and encourage you all to read it.

Planet name: Gelus (Latin, it means frost, coldness, cold, chill, ice, chillness)

Description: Has a very cold temperature all year, the temperatures range from -50 Farenheit to around -350 Farenheit. Huge towering statues of ice appear around the planet that look like stalagmites except on the planet's surface. The planet's surface is inhospitable, which is why all life that lives here lives in caverns where warmth is supplied by the magma that bubbles up from the relatively unstable core of the planet. The walls of these caverns are covered in vines and other plants that are used for food, even underground forests exist here. There are hollow and thin tubes in the walls of the caves caused by small serpent like creatures that slither around inside. The planet's year lasts around 758 Earth days due to the distance from it's sun, it's day lasts about 32 Earth hours. It is home to two sentient species, the Mors Dator (Death Giver) and Maculosos Nix Canem (Spotted Snow Dog). Half of the year, the planet's temperature remains below -200 Farenheit, the other half it remains above it, in a sort of two seasons, the smaller creatures are usually only active in the second part of the year.

Species that lives here: Gelu Custos (Latin: Ice Warden)

Description: Like all life that thrives on Gelus, the Gelu Custos, or Ice Wardens, live underground. They have hands that end in tentacles because when they sleep they grab onto slactites and sleep hanging from the ceiling of the caverns, this saves them from any possibility of magma boiling up from below them. They are omnivores and eat both plants that grow on the walls and small rodent-like creatures that thrive in the caves off of the seeds of plants. They are naturally passive but will attack if provoked, such as by stepping on their spore-pods or attacking them directly. They are about six and a half feet tall on average. The pincers on their head are used to grab onto pray that tries to escape, bringing the pray closer to their mouth, that is divided into three sections.

Species name: Spelunca Parasitus (Latin: Cave Parasite)

Description: Lives in the caverns of the planet, they tunnel through the walls and eat creatures that are hibernating and smaller than it is. They are relatively slimy. Once they reach a certain age, they attach to any creature large enough to be in their way. This is where the "parasite" part of their name kicks in. Due to their small size (About two inches each) an entire swarm will usually attach to a single creature and suck them dry of nutrients, then they will move on to the next creature. The Ice Wardens are usually the creatures who end up getting attached to.

Species Name: Mors Dator* (Death Giver)

Description: A ruthless sentient species, ever since they have had the technology to do so they have been completely covered in full-body suits that heat them and allow them to survive on the surface. Due to their ability to use these suits, they are the only species on the planet who can survive on the surface, however, they still get their food from the caverns. They form expansive hive-like cities on the surface. They are bipedal and the name Death Giver comes from their hostility towards practically everything. They are bipedal and sport three fingers plus a thumb. One has never been seen without their suit on. They are about seven feet tall on average and have three eyes, which is apparent from the three red visors visible on their helmets. They are omnivores, by nature they are hunters and they often gather plants from the caverns as well. They form complex languages and have written as well as spoken means of communication.

They often enslave creatures that they fight against. For example, they often use Spotted Snow Dogs as hounds when searching for food deep in the caverns.

Species name: Benevolens Cimex (Helpful Bug)

Description: Their name comes from the fact that they heat up the areas of the cavern they inhabit, making it more comfortable for the life there. They sustain themselves by eating the seeds of vines native to the deeper parts of the caverns. These creatures live all of the walls and their primary predators are Speculna Parisitus. They are known to live in packs of several hundred thousand.

Each one is only about half an inch long. Their queen is about five inches long. They live in a hive of sorts that is burrowed into the walls of the cavern but they are often on the ceiling of the main part of the cave.