Dragons

Chromatic-Tiamat
Red- Munviir

Blue- Aaktorok

Green-Vaazkrentoor

Black-Alakrast

White-Dakzoor

Metallic- Bahamut
Gold- Yudbeyntah

SIlver-Qaffheim

Brass-Kaaluvin

Bronze- Nylfathas

Copper-Naxomfoh

Dragonborn and Kobolds
Dragonborn are a race of dragonlike-humanoids that reproduce and live in a rather standard fashion, according to their physiology. Communities generally stick with their color as they are all technically different races and cannot reproduce with each other. They are freethinking and independent beings, but historically have remained loyal to their dragon of color, treating the dragon as a god on earth.

Kobolds, on the other hand, are asexual beings, of a more singular purpose. Whenever a dragon settles in an area, he or she will slough off bits of mucous and scales, all of these remains which produce fully formed adult kobolds. The kobolds have one function- to protect the dragon. The older the dragon, the stronger and more numerous the kobolds are. Sages argue about the free will of the kobold, but most agree that kobolds are little more than obsessive guards of their dragon. Their entire society is built around the construction of tunnels and forts around the lair of their beloved dragon. In the past, when a dragon dies, the remaining kobolds have been known to commit suicide en masse.

Dragon Death and Reincarnation
Dragons will live until killed. They are not prone to disease or illness. Upon being killed (usually by another dragon) their souls pass through Sheol to the Raven Queen, to go through the Great Auction, just as any other creature would. Back on the material plane, however, a dragonborn of the appropriate color will soon lay an egg, indistinguishable from a regular dragonborn egg. Upon hatching, it becomes immediately clear that the hatchling is a dragon, rather than dragonborn, and will usually be protected and hidden until it grows into its own power and intelligence. The dragon is technically a different creature than the dragon that died. It is not truly reincarnation, as it does not gain any knowledge or skill of the deceased, as do some other beings.

The Conflict
Chromatic dragons vs. metallic dragons. Bahumat and Tiamat were siblings, together some of the first created beings. Tiamat grew jealous of Bahumat's sheen and beauty. Tiamat, always crafty and more intelligent than her brother, slew Bahumat and some of her offspring. The metallic dragons have been waging a defensive war since the beginning of time. The chromatics, in their turn, rule over Xanadu and hunt down the metallics and their dragonborn, seeking to eradicate them.