Kammet

Kammet is a world on the back of an enormous, Earth-sized dragon. The dragon's original name is unknown, but the people upon its back call it Kammet. Magic infuses the very air, and all magic on the world is based in breath and sound - you breathe in potential and breathe out form.
Recently, one of the people of the spine has discovered how to craft constructs - intelligent, responsive, but entirely without breath or magic, creating a crisis in how to define 'life.'

Geography

The gravity on the dragon is variable, higher on the body and lower on the extremities. The gravity is highest on the body's sides, where the dragon is thinner, slightly higher on the belly, and moderate along the spine.
Rivers run along the seems between the dragon's scales, where heat and magic seep up from within the dragon. Soil covers the scales only thinly - more on the belly and sides, less along the spine and limbs. The scales are variable in size, but are mostly large. The average scale along the belly and sides is four miles across, while scales near the spine can be up to eight miles across. Most scales are eight to twenty miles long.
The scales on the joints are smaller and more flexible, making more opportunities for rivers and plants.
The sides hold wide, shallow seas - often no more than waist-deep, frequently shallower. The soil beneath the water is thick and nutrient-rich. Numerous plants grow in the water, and a few people live on thick, floating mats. The only waves are rare, formed entirely by the motion of the dragon.
A year is measured by the slow pulse of the dragon's breath most places, though the wing-folk measure it by the much longer beat of the enormous wings. A century is measured almost universally by the dragon's shed. The shed skin breaks away into flakes, mixing with the soil overtime.

Fauna & Flora

The flora rarely grows tall, mostly consisting of grasses, ferns, and water plants. Nearly all the flora grows in the riverbeds and lakes where energy seeps up. Plants tend to have long, trailing leaves for radiating heat and transpiring. Nothing photosynthesizes. Plants are often either darkly colored to discourage foragers, or brightly colored to encourage pollinators and seed dispersal. Plant colors vary widely in the absence of pressure towards one color - common colors include blues, purples, reds, and greens. Some plants with incredibly long and shallow roots grow on the scales themselves, trailing their roots far into the water. Heavily rooted plants are frequently killed once a century when the dragon sheds, and have adapted to reseed themselves afterwards. Aquatic fungi drift in the rivers and lakes, blooming dramatically during the shed.
Animals are mostly small, with only a handful of large predators, and the greatest diversity is found in the rivers and lakes. Animals on the spine and wings are more likely to be warm-blooded - only animals that can easily access the heat coming from below are cold-blooded. Animals gather around the rivers, making for a space of both opportunity and danger. The sapient Lodae have encouraged herd animals to grow larger than they otherwise would, though some enormous beasts had naturally existed along the spine.
The joints are a volatile section with a much higher diversity of plants and animals, and greater magic.

Natural Resources

The dragon's scales are incredibly hard, and the shed is both hard and flexible, making a popular material for housing and for tools. The shed is easiest to get a hold of in thick, large sections up near the spine. Belly-shed is thinner and more easily torn, making it more popular for clothing and rope.
Asteroids have brought the only metal and hard rock on the dragon. Most asteroid strikes are grouped near the front of the dragon, especially along the shoulders. Most of the impacts contain iron, nickel, cobalt, and small amounts of rarer metals like platinum and gold. However, most of the newer asteroid impact sights are hot due to cracks opened in the scales, and many have filled in with water over time.
The people make their homes out of a mixture of woven grasses and shed scale pieces, with the proportion of each varying between locations.

A Journey Between Stars

The dragon was born beneath distant skies, and grew slowly over its life until it had grown too large for its home planet. It took off into the stars, seeking out others of its kind. It travels along ley-lines, magically charged currents through space, that energize and feed it.
Long ago, several civilizations figured out how to access the ley-lines, traveling at enormous speeds between suns. Ships passed the dragon in the eternal night, and it rejoiced to find evidence of others. It frequently would follow the ships to their home port, visiting the myriad worlds of the galaxy. But in time the ships came less and less and the stars burned more dimly. It has been countless years since the dragon last saw a ship or reached a burning star. Only withered husks remain, sometimes ringed by the ruins of the people who once named them.
The dragon moves in search of a living world, but has recently concluded that little remains in this galaxy, and has set its sights on a nearby, younger galaxy.
A long journey through the dark awaits the dragon and its people.
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Type

Planet

The People of the Dragon

Most of the inhabitants of Kammet are short in stature. That extends to the primary sapient species, the Lodae. The Lodae are often no more than three feet tall, with furred bodies and large ears and eyes. The Lodae of the warm belly have such fine fur it's hardly visible, while those of the cold spine and wings are more heavily covered. The Lodae use bio-luminescent paint to decorate themselves, and sing or chitter or click constantly when not hunting. They navigate their dark world through a combination of infrared vision and incredibly keen hearing, enabling them to echolocate and identify their companions by the pattern of their breath.
Most Lodae are settled, living their lives on their islands, but the wing-folk drive their herds across the hostile expanse of the dragon's wings, and the neck-folk live among the ever-changing landscape of the dragon's primary joints. The magic released by the dragon's movement makes the breath of the neck- and wing-folk strong in body and magic.