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Yes, Volsung has the Waterbreathing effect, meaning that you can swim underwater for as long as you need.
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Signy or Signe (sometimes known as Sieglinde) was the daughter of Völsung and Hljod.
*Otar the Mad
*Rahgot
*Hevnoraak*Morokei*Nahkriin*Krosis*Vokun*Volsung
It is at the end of the Nordic ruin Volskygge.
Volskygge is to the far West, past Drragon Bridge, just South of Lost Echo Cave.