Final Fantasy II/Mission to the Snow Cave

Poft
Hilda has charged you with finding out more about Airships from the man who knows the most about them in the world: Cid. Cid is still based out of Poft, so you need to return there to speak with him. Ask him about Airships, and he'll mention Sunfire to you. Be sure to learn the term. if you ask Cid about it, he won't have any advice on where you can find it. You'll need to return to Altair with the information you received.

Altair
Back in Altair, speak with Hilda and ask about Sunfire. She will acknowledge that it is the crest of Kashuan, and that the flame still burns in Kashuan Keep. Firion will suggest that Sunfire can be used to destroy the Dreadnought, and Hilda will agree that you should collect the Sunfire, but first you need an item that you can use to transport the flame. However, it is Hilda's father, the king, who mentions an item you need to break the seal to the flame: the Goddess Bell. Return to Hilda and mention the bell to her. She will reveal that the bell is held in the snow plains, and that Josef may have some ideas to retrieve it.

Salamand
With this new knowledge, you must return to Salamand and speak with Josef. After making the journey back to Salamand, locate him and ask him about the Goddess Bell. He will tell you that you'll need his snowcraft to reach it, and that he keeps the snowcraft hidden in the mine at Semitt Falls. He says it's in a secret room near a blue stone on the first floor, behind and to the right. Regretful that he couldn't help you with the Mythril, he agrees to join you now.

By default, Josef possesses no weapon because he is skilled in bare hand combat. There is no need to equip him with a weapon since he fights better without one. Don't invest too heavily on armor for Josef, opting to provide him whatever you find for free in dungeons.

Semitt Falls
After making your way back to the cave entrance above Semitt Falls, and walk around to the blue stone that's visible from the entrance. Stand above and to the right of the stone, and examine the wall on your right. Josef will ask you to stand back while he presses the switch which grants access to the hidden room beyond. Inside, you will find the snowcraft.

you and help you retrieve the Snowcraft hidden in 1st floor of Semite Caves. It's behind and right of the blue rock, which you will see the moment you enter the cave. After you have retrieved the snowcraft, exit the cave and move to the northwest, to reach the snowfield. The entrance to the snowfield is on the left edge of the snowfield. Walk to the extreme right end of the snowfield using your snowcraft and enter the cave.

The snow plains
Now that you have the snowcraft, you can attempt to cross the freezing snowy plains north of Salamand. In order to reach the entrance, you must walk west from Salamand until the mountain range above allows you to head north. Walk north enough and you will see the entrance to the plains. Like the canoe on water, the snowcraft will automatically engage as soon as you step onto the snow.

The snowy climate is host to a number of enemies you have not yet encountered, like Snowmen and Icicles, so be prepared. To reach the cave where the Goddess Bell is contained, you must travel far across the snow plains to the east. Near the end of the plains, you'll find the entrance to the cave in small mountain range in the center.

Snow cave
If you explore the cave thoroughly you'll find a chest containing "Notus", which allows one of the party members to cast a heavy ice storm. Make sure you grab this item as it will prove usefulness towards the end of the cave. Move the lowest level and enter the room on the bottom right. You will see a few furry creatures there. Talk to the one on the top left corner of the room and Gus happens to know how to communicate in that language. The creature will tell you that the Goddess Bell is in a hidden room. You can find the entrance to the right edge of the room.

In the final room, the creature in the southeast corner will block access to the Goddess Bell. It is an adamant turtle, which is most vulnerable to Ice magic. Let one of your party members cast "Notus" as doing so will cause a heavy ice storm resulting into an instant KO. Its defense and attack can also be reduced by using the Ancient sword found earlier. When it is defeated, you can retrieve the Goddess Bell and return to the exit through the door to the right.

BOSS: Borghen
Upon reaching the exit, you will encounter Borgan who will block the exit. Before the fight, it is recommended to remove all Josef's gear, as he won't need it anymore and you may need the gold. He can be defeated using regular attacks, but he will sometimes cast CURE 3 on himself. After the battle, Josef will be killed by a trap while sacrificing himself to save your group.