Þorsteins saga Víkingssonar

It begins in Norway and Sweden (with locations such as Ulleråker), but continues into exotic places such as India.

Viking befriends his worthy foe Njorfe, King of Upplands, in Norway, who also has nine sons.

They use magic to conjure a frost that freezes the lake and travel across it to attack the three sons of Viking.

Ingeborg (as a troll, under the name Skellinefja) rescues Thorsten and asks him to promise to marry her.

Thorsten, Beli, and Angantyr retrieve Viking's stolen magic ship Ellida.

Thorsten fights Sote, a ghost pirate in a barrow mound, to get the magic ring (forged by Voland).