Deacon Blackfire

According to the original story, Joseph Blackfire or Deacon Blackfire, managed to tap into the power of immortality by bathing in human blood. Merely hearing the name Blackfire in the show would suggest a dark and bloody episode. Gotham needs a villain that can reflect some of the most dreadful convictions one can abide by, and Deacon Blackfire can definitely serve such a purpose. The writers need not make him immortal in the show, but he can still be convinced that he is. Furthermore, the second season's main antagonist, Theo Galavan, belongs to the cult of somewhat religious zealots, and they gave a nice ring to the whole show, so why not introduce Deacon Blackfire. So far, the show has shown the slums of Gotham, but people there are more less passive "“ Deacon could organize them and become a formidable foe. It would be "The Cult" all over again.