Palace of Twilight
The Palace of Twilight is the eighth and penultimate dungeon in The Legend of Zelda: Twilight Princess. It is the only dungeon in the game located in the Twilight Realm, and features Zant as its boss. The dungeon item is the Light Sword, which is an upgrade of the Master Sword that enables Link to cut through the darkness that is abundant in the dungeon. It is one of the few dungeons in the series where the dungeon item is merely an upgrade of another item.
The first task Link faces in this dungeon is to return the two Sols to the entrance of the Palace. To do this, he must first fight Phantom Zant and then carry the Sol out of the dungeon while being chased by Zant's Hand, which act a little bit like Wallmasters. He must do this twice, on each side of the dungeon to get both Sols. Link can now use their power to upgrade his sword to the Light Sword, allowing him to go further into the dungeon. He can use the Light Sword to quickly get to the Boss Chamber of the dungeon, where Zant is there, waiting. Zant tells Link and Midna the story behind his power, how he has been borrowing Ganon's power for his own use. After story-time is over, Link and Zant fight to the death, Light vs. Twilight.