This is the final area of the game, where you will take on three consecutive bosses. You cannot retreat between fights, though you can return to the menu. You may want to bring along three Death-resistant items (e.g., Cherub's Crowns), as they will help out with part 2. None of the bosses drops anything, so remove any Item Collector Accessories you may be using. When you win, you will be able to save at the end of the credits. This save will bring you back to The Narthex save point, but with the final Crystarium stage unlocked. Your inventory will remain as it was at the end of the fight, so if you used any Elixirs or such, they will remain gone.