Golden Key

The Golden Key is a quest item from The Legend of Zelda: Four Swords. Link needs three of these keys in order to access Vaati's Palace; however, he will only be able to obtain these keys after playing through the game once, obtaining three Silver Keys, and defeating Vaati.

After defeating the boss of the Sea of Trees, Talus Cave, and Death Mountain, Link will meet a Great Fairy. If he has collected over 3000 Rupees in the stage, the Great Fairy will award him with a Golden Key. If Link receives a Golden Key from a stage, the next time he travels through the stage, he will be able to obtain the Hero's Key if he obtains enough Rupees.