Ancalagon thought about what the dragon had revealed, and he remembered a rare type, that was almost clear, and said, "Then for my third guess, a force dragon? I do not know much about them, other than that they are incredibly powerful, are naturally invisible after a certain age.<br/><br/>The lich was defeated some time ago, and the black dragon moved in afterwards. I then defeated her, and claimed her and her lair as my own. And yes, an incorporeal living in a maze does kind of defeat the purpose of a maze, since it can move through walls."