Bahamut

Bahamut is the dragon god of law and justice. He is the eternal rival and enemy of Tiamat of the Five Heads.

Description
Bahamut's divine form is well documented due to his continued presence and guidance in the activities of his followers. His divine form is that of a colossal sized dragon with platinum scales that gave off a faintly blue glow. His eyes are said to be an indescribable shade of blue.

When the dragon god has traveled to the mortal plane without the desire to alert his followers, he has been seen as taking the guise of a blind old man with seven ravens following him. Other descriptions include a nobleman from a far off land in a silver carriage led by 7 horses.

Realm
It is not completely known where Bahamut's realm truly lies as he has never brought any mortal to the Palace of the Dragon God