Mirror Chamber
From Zelda Wiki.org
This is a part of the Gerudo Desert. Link enters the mirror chamber in Twilight Princess. The Mirror Chamber is a room located above the Arbiter's Grounds, but Link cannot gain access until after he defeats Stallord, the dungeon's boss.
The five sages appear and describe how the broken mirror is the evil work of the evil one known as Zant. From this point, Link and Midna begin a new quest in order to retrieve three missing mirror shards to repair the mirror.
Upon returning with the three missing shards, Link and Midna repair the mirror. Midna tells a short, but upsetting tale of how she was trying to use Link to help return her world, the Twilight Realm, to order. It was a peaceful place until Zant overthrew Midna, the Twilight Princess, and claimed the throne as his. From this point, Link begins his journey into the Twilight Realm once more. The mirror takes him to an area of the realm he has never been to before. It is also here that the eighth dungeon, the Palace of Twilight, lies, and where Link must put an end to the evil emperor Zant.

