|Appearances||Fatal Frame II: Crimson Butterfly|
The player receives the key after successfully completing the Tome Puzzle in the Masters Room. This key is required with the Shadow Key to unlock the door to the cell which held Seijiro Makabe. Also making an apperance in Fatal Frame III: The Tormented, when playing as Kei it is used to unlock the cage containing his niece, Mio.
The key is of the skeleton variety and has two interlocking squares across the top, the symbol for light, and a rounded handle.
In Fatal Frame III, if picked up first and the shadow key last, the player will be closer to the bars when a vanishing ghost appears.