Your next destination is Kazus, a town cursed by Djinn, turning its inhabitants into ghosts. Cid will guide you here. In Kazus, you'll learn about the Djinn and the need to break the curse. Before entering the Sealed Cave, make sure your party is well-equipped. Consider having a Black Mage for offensive magic and a White Mage for healing. The Sealed Cave is your first real dungeon challenge. The enemies here are stronger than those in the Altar Cave, so be prepared for more frequent healing and strategic use of magic.
Navigate through the cave, collecting treasure chests. You'll eventually reach the Djinn. This is your first boss battle. The Djinn is weak to Ice magic, so have your Black Mage cast Blizzard spells. Keep your White Mage healing the party, and your physical attackers (Warrior, Monk) dealing consistent damage. After defeating the Djinn, the curse on Kazus will be lifted, and you'll receive the Horn of Ice, a key item for later progression. Return to Kazus to witness the town's restoration and prepare for your next adventure.