Flute

The flute, also known as the whistle, is an item in Zelda II: The Adventure of Link and the main item of the Palace on the Sea. The flute is a mysterious instrument that plays the ancient music of Hyrule, causing various events to happen. The flute has two important uses; it is used to defeat a River Devil obstructing a road on the land map and to reveal the sixth palace, Three-Eye Rock Palace, when Link plays the flute at the Three Eye Rocks.

Zelda II: The Adventure of Link

 * North American instruction booklet: "You will play the legendary mysterious of Hyrule. The sound rouses old powers."