Onox's Castle is the final dungeon in The Legend of Zelda: Oracle of Seasons. Located atop the Northern Peak, it is the home and stronghold of General Onox, the antagonist of the game. To gain access to the palace, Link must have obtained the eight Essences of Nature and the Maku Seed. Unlike previous dungeons of the game, Onox's Castle is relatively short and linear. It contains no Small Keys, Treasure Chests, Dungeon Map, Compass or Boss Key. It consists of seven rooms, three of which contain no enemies.