In Norse mythology, Grimhild or Grímhildr (masked battle) was a beautiful but evil woman. She was married to king Gjúki, of Burgundy. She had three sons, Gunnarr, Hǫgni and Guttormr, and a daughter, Gudrun. She was the sorceress who gave Sigurðr a magic potion that made him forget that he ever married his wife Brynhildr, so that he would marry Gudrun, her daughter. But she did not stop there. She wanted her son Gunnar to marry Brynhildr, but she refused to marry him, and she would only marry the man who could cross the ring of flames she put up around herself. So Grímhildr talked Sigurðr into helping Gunnarr marry Brynhildr. Since Sigurðr was the only one who could cross the flames he and Gunnarr switched bodies, so Gunnar's body could cross the flames. Brynhildr then married Gunnar, becau