Requiem of Spirit

The "Requiem of Spirit" is a recurring song in the, first appearing as a playable melody in Ocarina of Time.

Ocarina of Time
In Ocarina of Time, the "Requiem of Spirit" is one of the warping songs Link learns as an adult. It is taught to him by Sheik at the Desert Colossus after the young hero exits the Spirit Temple once he realizes he cannot enter it yet. It allows Link to warp to the Desert Colossus at any age, which is necessary in order to access the Spirit Temple as a child.

Twilight Princess
Twilight Princess features this song as a requirement to learn a Hidden Skill from the Hero's Shade at Upper Zora's River. Wolf Link must howl this song near the Howling Stone at the Upper Zoras River.

Etymology
A requiem is a form of music whose theme is a prayer for the salvation of the souls of the departed, and it is used both at services immediately preceding a burial, and on occasions of more general remembrance.