Bahamut, the King of Good Dragons, is the dragon god of justice and a subservient deity to Dieus, god of justice, as a deity of good dragons, metallic dragons, wisdom, and enlightened justice
His natural form was that of a platinum dragon, said by many to be the only one of his kind. He was also the eternal rival of his sister Tiamat, Queen of the Chromatic Dragons.
Description
In his natural form, Bahamut was a massive dragon with a tail the same length as his body, with platinum scales tougher than any shield (said by some to be virtually indestructible) that glowed with a faint blue sheen, and blue eyes, the exact color of which was hard to specify and may have depended on Bahamut's mood.
When he wished to wander the mortal world, he usually took the appearance of an old human or demihuman wizard dressed in peasant robes accompanied by seven canaries or other songbirds. Some sages believed Bahamut used this humanoid guise to not frighten non-dragon beings. They also believed that while Bahamut was fond of his old man guise, he had other guises as well. Other recorded guises included that of a prince with a carriage drawn by seven horses, an urchin accompanied by seven friends, a beggar followed by seven dogs, a humble fisher or a young monk who bear the title of the "Grandmaster of Flowers."
Personality and Power
Bahamut was stern and very disapproving of evil, always arguing with Asgorath about his crusade against it. He accepted no excuses for evil acts, and didn't tolerate even minor offenses by evil creatures. By draconic standards, Bahamut was neither vain nor desirous of treasure. He valued wisdom, knowledge, prophecies, and songs instead. He used the great wealth he had amassed over the ages to help those in need while using the magic items he had gathered to further his goals. However, he also pursued viciously (usually sending his champions and followers) those who tried to steal the hoard from his palace as, after all, he was a god of justice.
Despite his aversion to battle, he was easily capable of defending himself. Along with all the standard powers and godly senses of a deity of his rank, as well as the natural abilities of an ancient dragon, those who saw him fight claimed that he had two breath weapons, one a powerful cone of cold, the other a vapor that turned his enemies into gaseous forms. A third special attack was his roar, which was so powerful that it could disintegrate creatures or objects within 100 feet (30 meters). If facing off against more powerful creatures, this roar would still permanently deafen those who weren't turned to dust. On top of that he was more powerful than any mortal dragon, and was also reputed to know every arcane and divine spell.
Relationships
Bahamut's allies included good dragons, half dragons, dragonborn, and good draconic creatures. Bahamut was a servant deity to Dieus, occupying an equivalent position to that of a knight. As a comrade in arms of Qilgyn, both deities had battled side-by-side against evil gods and devils on many occasions.
Bahamut's antithesis was Tiamat, as both of them represented opposing values, and this enmity was reflected in the attitude of each deity's worshipers as well. He was also at odds with his niece Ereshkigal.