The Skin Satchel
Hunger and need have fallen upon Niklas's village. He accidentally witnesses a troll take six grains from a leather satchel and in minutes grow an entire field of wheat. He resolves to obtain the magic satchel, but the treasure is hard to find and even harder to keep. The satchel can only be found at night but must be retrieved by sunrise. During this time the trolls cause such terror that one might lose the treasure by letting go of the satchel or speaking a single word.