Hero's Keys are quest items from The Legend of Zelda: Four Swords. Link needs three of these keys in order to access Vaati's Palace a third time; however, he will only be able to obtain a Hero's Key from a level after earning a Golden Key from the same level.
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 5,000 Rupees in the stage, the Great Fairy will award him with a Hero's Key.
After defeating Vaati for the third time by means of the Hero's Keys, the game is complete.
|Link (x4) · Princess Zelda · Vaati|
—Full list of characters
|Deguchitato · Derazoru · Gouen · Vaati|
|Chambers of Insight · Sea of Trees · Talus Cave · Death Mountain · Vaati's Palace · Hero's Trial · Realm of Memories|
—Full list of locations
|Bomb · Boomerang · Bow · Bow-Wow · Four Sword · Shield|
|Armor Seed · Fairy · Gnat Hat · Heart · Heart Container · Magnetic Glove · Pegasus Boots · Razor Seed · Roc's Cape · Rupee · Pegasus Seed · Small Key|
|Golden Key · Hero's Key · Medal of Courage · Silver Key|