In Finnish mythology, the Sampo (pronounced [ˈsɑmpo]) or Sammas (pronounced [ˈsɑmːɑs]) is a magical device or object described in many different ways, constructed by the blacksmith, inventor and originally the sky god Ilmarinen, and which brings riches and good fortune to its holder, akin to the horn of plenty (cornucopia) of Greek mythology. A central myth in Finnish mythology is the idea that the sampo was once in Pohjola but a group of heroes attempt to steal it. Sammas as something at the center of the world also exists in Estonian mythology.
https://en.wikipedia.org/wiki/Sampo