So, if you gather 7 septimus medals you will unlock The sky pirate's hideout dungeon located in a star shaped island. Legend says the there lies the pirate king treasure! But lo and behold! There's no f*ckin treasure! Only strong monsters, a f*ckin maze, and a super strong boss that one hits you. So after defeating the boss, you expect a super rare drop, material or accessories that boost your stats. Sadly, no drops. Not even a usefull accessory. Half an hour battle and all you get a hades' hook, which boosts your attack power when your are near death which isn't that useful cuz we don't like being near death and we like being full hp all the time, that why we have accessories that boosts hp and mp. Long story short: the boss is a waste of time.