Herr Magnus og Bjærgtrolden
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Herr Magnus og bjærgtrolden ('Sir Magnus and the Mountain Troll') is a Danish ballad (The Types of the Scandinavian Medieval Ballad A 59, Proposal of supernatural woman rejected; Danmarks gamle Folkeviser 48).
A supernatural maiden (a mermaid in Norway and sometimes Sweden, or a female mountain being in other Swedish versions and in Denmark) tries to woo Sir Magnus by offering generous gifts. Magnus, however, rejects her; and in the Danish versions, he chops her into small pieces with his sword.