The polar bear swims close to the diamond while the arctic fox is guarding the arctic's magic diamond that protects the arctic tundra.
When the arctic fox falls asleep the polar bear steals the magic diamond to store in his collection of magic diamonds.
The arctic fox figures out the polar bear was the one who had stolen the diamond and that the polar bear had a stash of magic diamonds. So there was this epic battle to see weather the polar bear hands over all the magic diamonds that he stole and the arctic fox returns to protecting the arctic tundra once again.or if the polar becomes the ruler of the arctic tundra.
The arctic fox wins the epic battle and is renamed the protecter of the arctic.