Final Fantasy II/Mission to the Snow Cave

Josef the villager
Default weapon: karate (Japanese for "bare hands").

Don't give any weapon to Josef, but train him with Karate. Give him the best armor parts you find for free in dungeons.

Salamando
When you talk with Cid about his Airship, he will mention that it is powered by the SunFire. When you return to the king with this information, you will be told about the Goddess Bell. Hilda will send you back to Salmando to track down the location of the bell.

Look for Josef in the top right house in Salamand. Ask him about Goddess Bell and he will join 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 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.