Final Fantasy III/Sealed Cave

When you enter the Sealed Cave, you find yourself in a large chamber. Walk straight ahead, and follow the curving path until you arrive at a two-way split. Keep traveling forward to find a chest (Potion), then return to the split and take the other path to travel deeper into the dungeon. Follow this path until you reach a path that leads off into a small chamber with a chest (Spell Cure). After this, continue to follow the path to a set of stairs.

In the next cave go down-left for a chest (500 gil). Then go to the skull at the top-right corner. Zoom in and you see that it shines. Activate it and the wall will upon up. Continue along the path and enter the next room. A cutscene will play and Princess Sara will join the party. Continue into the next room. With you can speak with Princess Sara if you wish to do.

Go along the path until you get to crossroads and take the path leading down for a chest (Antarctic Wind) and then take the path going up. After you get to the large chamber, go down and get the chest (Eye Drops) then go up slightly and take the path going left. The path will turn down into a large chamber with another path leading to the right. It is advisable to heal your party members as the Djinn is right around the corner.

Boss: Djinn
Level: 7| HP: 600 | Weakness: Ice, Water | Gil: 1400 | EXP:200

The quickest way to defeat this boss is to use two antarctic winds as they do 350 damage. However, there is alternative which uses one less wind: Cast Blizzard, Use Antarctic Wind, WightSlayer attack, and someone heal. After you defeat the djinn, you will then teleported to Altar Cave, then the credits will roll. Once the credits finish, a Moogle will give a short explanation about the job-change you now can do. Walk past the crystal onto the pink portal.

You could stay Freelancer or change the jobs of your Party however you want (for example form 1 Warrior, 1 Thief, 1 Red Mage and 1 White Mage). For more infos on the 5 first jobs check Job List.

You will then be transported out of the Altar cave. Once on the world map, it is advisable to save. Go to Castle Sasune where Princess Sara awaits you. Princess Sara will throw the Mythril Ring in the Holy Spring under the Castle to lift the Djinn Curse. After the Curse is lifted, the King will thank you with a Folding Canoe.