who is sold as a slave to the smith-god-hero Ilmarinen after his father was murdered. After much abuse Kullervo kills Ilmarinen's wife by summoning pack of wolves and bears and enchanting them into cows that turn back and tear her apart when she tries to milk them, forcing Kullervo to run away to escape the wrath of Ilmarinen. He later sleeps with his own sister (without knowing it was her), wages war that kills rest of his relatives against his uncle Untamo (who killed his father) and dies by his own magic sword, after asking if it would kill him (it had killed men both better and worse than him so why not, sword answered).
Obvious resemblance to Estonian folklore is obvious.