Intermediate God (Lawful Good)
Bahamut is depicted as a massive, long and sinuous dragon with silver-white scales and blue, catlike eyes. The exact color is hard to specify and may depend on Bahamut's mood, ranging from sky-blue to frosty indigo. About a quarter of the time, Bahamut wanders the world in the shape of a human or some other guise. He is said to have been encountered as a frail old hermit, with the seven great golden wyrms that accompany him disguised as seven canaries singing sweetly nearby.
Symbol: Silver Dragon Head
Portfolio: Air, Honor, Justice, and Storm
Domains: Hope, Justice, Protection, and Storm
Favored Weapon: Broad Sword
Allies: Malkind, Pelor, Jortin, Mugar, Obad-Hai, and Celempietal
Enemies: Bane, Asmodeus, Grapog, Tiamat, and Lloth
Cleric Training: Bahamut only accepts good-aligned priests. They strive to constantly yet subtly act on behalf of good. They oppose evil, but their first mandate is to ensure they do no harm in the process.
Quests: The servants of Bahamut strive to root out evil, especially evil dragons, and protect the weak.
Temples: Bahamut’s temples are beautiful, elegant edifices characterized by clean, simple architecture and furnishings. Within them will be public rooms in which the faithful can gather and private rooms for meditation and recuperation. Dragons will not normally build temples, contenting themselves with simple symbols on the wall that they treat as shrines. Bahamut prefers his followers to worship him with deeds, not objects.
Rites: The counting of deeds. Rite of Rebirth (where humanoids become dragonborn).
Herald and Allies: Good Dragons
Relics: Bahamut’s Silver Shield, The Seven Dragon Spans, Bahamut’s Tear
Bahamut is a god included in both 4th and 3rd edition (and earlier one's in fact). He was one of the only WoTC gods I used in my third edition campaign. I use him almost exactly as they do, with a little embelishment and some slight changes to domain to help balance out the other gods.
In order to keep the number of gods down, I do not use the full draconic pantheon.