The Black Dragon
Even it’s own kin are loathe to speak of him, the Black Dragon, the Prisoner and Master of Secrets. What led to his imprisonment, and how exactly it was enacted, is unknown. Still, he is held captive by his brethren and for a reason they will not divulge at any cost.
At one time, the Steel Dragon spoke to the scholars of the world, and told them that nearly every secret of the world was held in the Black Dragon’s mind, that he was the Keeper of Secrets, and was thus a danger that had to be contained – for the good of all, including the Black himself.
Nothing more has been revealed about the Black Dragon.