Xhcriarana

The Xhcriarana is a type of subterranean centipede-like insect which lives in deep burrows and caves within the Earth. They have a seven year reproduction cycle, in which thousands of eggs are laid and develop in deep caverns, to explode in a feeding frenzy on the surface.

Underkin

The Underkin are an offshoot race of humanity, locked away in a series of underground caverns during a cataclysm at the end of the last ice age. Centuries of inbreeding as well as proximity to deposits of radioactive elements have mutated them into a state unrecognizable as human. They come in all shapes and sizes, with any number of eyes, limbs, and skin tones. The Underkin have built an advanced society, and through the millennia have advanced in science and technology to a point superior to the surface dwellers.

Azeluqot

Azeluqots are small, blue, puffy humanoids that live underground in large warrens. They prefer to live a simple existence of subsistence foraging and farming. The primary staple of their diet is a type of underground fungus, which the Azeluqots grow in vast caverns. They prefer to stay out of sunlight as much as possible, as bright lights tend to hurt their eyes.

Rock Wurm

Rock Wurms are massive worm-like creatures which carve out subterranean caverns. As larvae they secrete an adhesive which binds a layer of rock to them that acts like an armored shell. As they grow older the rock then bonds to their skin permanently. Periodically they creatures must shed their skin, after which the wurm must procure a new rock shell. Rock worms eat and excrete soil, living off the nutrients and biota contained within. Older adults can reach a truly massive size of 300 feet or more.

Phunguskrabb

Phunguskrabbs are a breed of land dwelling crabs which make their lairs in deep caverns and crevices. Although meat makes up most of the creature's diet, the crab cultivates several different species of fungi upon it's shell, which is feeds upon in times of scarcity.

Cave Dragon

Cave Dragons are gigantic, subterranean lizards. As young they are born blind, and use a highly developed sense of smell to hunt bats, rodents, and small animals. As the beast grows to gargantuan size it develops keen night-vision that allows it to hunt on the surface at night.

V'sthol'Nala

The V'sthol'Nala are a race of burrower demons. They live in a vast complex of tunnels which honeycomb the flesh-like rock of their native Hell dimension. The V'sthol'Nala do not possess sight, hearing, or olfactory senses, and instead navigate through a highly developed tactile sense. Their extremely sensitive skin can sense any vibration around them, even through soil. This sense is so sensitive that one of their race can "read" the vibration can understand when speech is directed to it.

KedgeWurm

Massive carnivorous worms which plow through the soft earth seeking carrion. KedgeWurms feast on the dead buried from cemeteries above, as well as from multiple races who make their homes in the subterranean realms. They will continue to grow as long as there is a steady food supply. Some have been spotted with a length of 30 feet or more.

Malsoricphite

Malsorcphites are large creatures that live in underground tunnels. The large front teeth and clawed limbs are used to quickly excavate new tunnels and chambers. A Malsorcphite warren can be dozens of miles long and contain hundreds of individuals.

Fungaloid

Fungaloids are essentially giant walking puffballs. They begin life as part of a colony organism (called "the Mass,") inside of a deep underground cavern. When a Fungaloid matures it breaks free from the mass and develops tendrils for walking or handling objects. Each Fungaloid is bred for a specific job, such as digging new tunnels, defending the warren, farming lichens and other fungus for substance, or gathering rotting organic matter for the Mass to feed upon. Fungaloids do not posses a sense of individual self like other sentient creatures do. At the end of each cycle young Fungaloids rejoin the Mass to rest and dream. Although Fungaloids are generally non-violent when not threatened, prolonged separation from the Mass will cause a Fungaloid to act erratically, growing more and more violent until it finally breaks down into a psychotic episode. Despite this limitation, there are older Fungaloids who travel extensively, and only feel the need to return home once every few decades.

Gugalite

Gugalites are bizarre subterranean dwellers, that live in deep caverns miles below the surface of the Earth. Despite their strange appearance they are quite intelligent, and have been known to maintain fish populations in vast underground lakes and to grow certain types of phosphorescent algae as a food and light source. There have been several incidents of deep oil well drillers encroaching upon their settlements, of which the Gugalites consider a hostile encroachment upon their territory.

Mugulite

The Mugulites are a tribe of primitives that live in a deep subterranean realm of vast caverns. They have short, squat bodies, with the face occupying all of the torso. Their eyes are especially adapted to low light, as the only light sources are open rivers of magma and caverns of phosphorescent algae. They have developed a loose hunter-gatherer culture with a language based on grunts and growls. They will occasionally make raids to the surface to procure certian materials such as wood, they never tarry long as the open air and sunlight makes them uncomfortable.

Worm Flyer

Cycloptic parasitic flying worm like creatures that live in deep subterranean caverns. The huge eye is adapted to seeing in near darkness.