Dragon

Dragons are very powerful and magical creatures. As they grow older they become even stronger until few beings can challenge them. There are several types of dragons, the most common of which are chromatic and metallic which are evil and good respectively.

Dragons are an ancient race. Few species that still exist can claim longer lineage. They were the bane of the creator races of Toril, their line is so old. They had their own realm during the first recorded exploits of the elves.

Today, the dragons of Toril are nearly all recluses or at the very least deceptive to their true nature, living amongst other species in polymorphed form.

With the advent of the Cult of the Dragon many chromatic dragons have been tempted to become Dracoliches for one reason or another.

Religion
Dragons worship Tiamat, Hlal, Null and Task. The Draconic pantheon was larger before the advent of 3rd edition D&D with Asgorath, Astilabor, Garyx, Kereska, Lendys, Tamara, Xymor and Zorquan all being written out of the rulebooks. Bahamut is venerated as a god by some goodly dragons, though he is not officially a member of the draconic pantheon.

According the the Draconic creation text, the  Book of the World, Asgorath cast down the god Zotha and observed the two elements of existence: The world and the Crystal Sun. She wrapped herself around the Crystal Sun and breathed on it. This caused the sun to shatter with the fragments piercing her flesh. Drops of her blood fell down upon the world and where they landed, Red dragons were brought into existence. The new creatures lamented the loss of their creator, all except one who pulled a fragment of the Crystal Sun out of Asgorath and cut himself with it. The blood fell to the earth and also created life, though this life was metallic in colour, rather than red. Asgorath began to stir so the 'renegade' and his progeny fled to the farthest corners of the world. Analysis by the scribes of Candlekeep of this text reaches the conclusion that Asgorath is Tiamat and the Renegade is Bahamut, though many counter-theories exist and no hard evidence is available to proove anything.