Gríms saga loðinkinna

He ruled over most of Halogaland, a province in northern Norway, and traveled south to betroth Lofthæna, daughter of Harald, a powerful ruler in the Oslofjjord.

On a subsequent trip to Finnmark in the far north, Grímr vanquishes two trolls in a cave encounter and then loses all his men in a pitched battle over a beached whale.

Close to death himself, a hideous troll woman offers to help him, but only if he will kiss her and lie with her at night.

He awakes to find Lofthæna, who had been transformed to an ogress by a curse of Grímhild, her wicked step-mother.

Angered by her rejection the unwelcome suitor challenges Grímr and his men to a duel on an island (holmgangr) and shows up with eleven berserkers.