Well because the chest you're looking for isn't in there. You can't beat that dungeon without getting all of the chests, and it's blocked off to prevent people from falling into the sealed-off rooms in the area where you fight the boss and getting stuck.
Well because the chest you're looking for isn't in there. You can't beat that dungeon without getting all of the chests, and it's blocked off to prevent people from falling into the sealed-off rooms in the area where you fight the boss and getting stuck.