I am DM'n a campaign and am just wingin it as the groups personal goals grow. I have come to a point where an evil nemesis would be great and the group even helped pick indirectly what it would be. I'm looking to make a Black Dragon Necromancer. I'm using the Ancient Black Dragon in the Bestiary 1 as a basis. As I am unfamiliar with Pathfinder and am reading everything I can find, with no success, I am trying to find what methods to use to build a necromancy loving black dragon and be rules balanced in the end. Maybe I hope too much. But anyone who knows or has a balanced idea to make this powerful nemesis capable of existing, please, teach me.