Sylph's Cavern

How to unlock
You can unlock this optional dungeon to obtain an esper, Tetra Sylphid. To unlock this dungeon:
 * 1) Clear Clouds of Lasting Light - Exploration
 * 2) Go to City of Illusion and talk to the ghost in front of the crystal.
 * 3) Go back to Clouds of Lasting Light - Exploration again and clear by walking to the exit manually after you have beaten the boss by selecting "Continue".

New Trial of the Wind Sprite

 * Guide: New Trial of the Wind Sprite

Unlocks when Tetra Sylphid reaches level 40.