Song of Healing

The "Song of Healing" is a recurring song in the  series, first appearing in Majora's Mask.

Majora's Mask
In Majora's Mask, the "Song of Healing" is taught to Link by the Happy Mask Salesman after Link gets the Ocarina of Time back from Skull Kid. This song can heal a broken soul and give peace to those who cannot forget, and it plays a major role in the game. It is used to receive the Goron Mask and the Zora Mask, and it's used to remove the Deku Mask at the beginning of the game. The "Song of Healing" is also used to heal Kamaro, a dancer's ghost outside of Clock Town, and the researcher in Ikana Valley.

Spirit Tracks
A song under the same name makes an appearance in Spirit Tracks, learned at the entrance to the Forest Temple. However, the song itself sounds and functions entirely different. Playing it with the Spirit Flute while in a dungeon causes a fairy to come and heal Link completely, but it can only be used once per dungeon.

Twilight Princess
In Twilight Princess, the Golden Wolf that teaches Link the Shield Attack is summoned when Wolf Link howls the Majora's Mask version of this melody at Death Mountain.

Trivia

 * In Majora's Mask, playing the "Song of Healing" for Sharp will have him remark that, while the song has something soothing, a song like that has no longer effect on someone like him.
 * If Link cuts up a wooden sign in Majora's Mask, the "Song of Healing" can be played to repair it.
 * The notes in the "Song of Healing" of Majora's Mask are the same as Saria's Song, except they are reversed.
 * Oddly, when Link plays the song in the European version of Spirit Tracks, it says that he played the Song of Recovery.