Crystal Tower

The Crystal Tower (クリスタルタワー, Kurisutarutawā), also known as Sylx Tower (シルクスの塔, Shirukusu no Tou), and, in the DS remake, as the Syrcus Tower, is a location from Final Fantasy III. The wizard Xande has set up base here, since it is here where the imbalance of light and darkness is strongest. It contains a portal to the Forbidden Land, Eureka.

High in the tower is a mirror surrounded by five dragons. Anyone who looks in this mirror will be inflicted with the Curse of the Five Wyrms, and will be unable to move. Only five people of pure hearts will be able to break the curse, by standing in front of each of the dragons.

After the Warriors of Light defeat Xande, the Cloud of Darkness opens a portal to the World of Darkness here, hoping to return all things to nothing. The party must enter this portal to defeat the Cloud of Darkness.

Enemies

 * Gomory
 * Bluck
 * Doga's Clone
 * Azer
 * Platinal
 * Kum Kum
 * Shinobi
 * Dark General
 * Yellow Dragon
 * Green Dragon
 * Red Dragon
 * Glasya Labolas
 * Thor
 * Xande (Boss)

Music
The Crystal Tower has its own, eponymous, theme, whose NES version was later used as a bonus track for Dissidia Final Fantasy.

Final Fantasy Tactics
The Crystal Tower was mentioned as one of the wonders in Final Fantasy Tactics. It bears the following description:
 * This spire, once the heart of the ancient kingdom of Baron, was protected by the labyrinthine city at its base. The tower’s crystal walls were a symbol of the royal family’s wealth and power, but also of oppression