Crown Key

The Crown Key is a quest item from The Legend of Zelda: Oracle of Ages. After obtaining a Bomb Flower from defeating the Great Moblin in the Present, Link can free the Goron Elder from the collapsed part of the cave in the Past. As a reward for freeing him, the Goron Elder presents Link with the Crown Key. Using it, Link can gain access to the Crown Dungeon on Rolling Ridge in the Present.