Level 1: Here be dragons.
Boss: Celtic Wyrmling Dragon
Level 2: Never laugh at live dragons.
Boss: Saxon Youngling Dragon
Level 3: Come not between the dragon, and his wrath.
Boss: Celtic Adult Dragon
Level 4: When the prison doors are opened, the real dragon will fly out.
Boss: Saxon Mature Dragon, Friend: Chinese Ancient Dragon
Level 5: So comes snow after fire, and even dragons have their endings.
Boss: Saxon Ancient Dragon