Throughout the novels and the world book, we are constantly reminded of the many struggles between bloodraven and bittersteel. Bloodraven made it his life's work (before being sent to the wall) to put down blackfyre rebellions. His hatred for the blackfyres is also what gets him sent to the wall by Aegon V the unlikely, when he beheads a blackfyre who was promised to be included in the great council that chose Aegon V. The third dunc and egg tale is about bloodraven suppressing a blackfyre rebel