Bell says the one eyed black dragon is like a god foreshadowing something like that might come into play Black monsters have a trend to be created by gods coming into the dungeon Perhaps, The oebd absorbed a god and that is why it is so powerful Athena and Enyo are probably the first goddesses to venture into the dungeon. They used arcanum causing the dungeon to produce the black dragon. Which absorbed Athena. Enyo Longs to be free like the one eyed black dragon causing this reoccurrence.
Even Fujino Oomori addresses the black monsters with carefulness not to give anything into play