In Finnish mythology, the Sampo or Sammas was a magical artifact of indeterminate type constructed by Ilmarinen that brought good fortune to its holder. When the Sampo was stolen, it is said that Ilmarinen’s homeland fell upon hard times and sent an expedition to retrieve it, but in the ensuing battle it was smashed and lost at sea.
Kullervo is the vengeful, mentally ill and tragic son of Kalervo. He was abused as a child and sold into slavery to Ilmarinen. He is put to work and treated badly by Ilmarinen's wife whom he later kills. Kullervo is a misguided and troubled youth often at odds with himself and his situation. He often goes into berserk rage and in the end commits suicide.