|Flask of Oil|
In order to enter the Music Room and thus obtain the flask, we first have to retrieve a set of Pan Pipes from inside the Raquia Maze, allowing us to play the little fanfare whose notes are carved into the wooden door.
The oil has to be used on the door to the Library Room (containing the parchment with the password required for opening the door with the moving face) which would otherwise creak too loudly and waken Raysiel.
Adam: It's a flask - full of oil judging by the smell.
Adam: Works a treat on those doors huh?