Imprisonment of Loki
Sigyn is present at the imprisonment of her husband Loki. Whether this even has happened, or has yet to happen, is unknown.
Odin, unable to murder his own blood-brother, instead transforms Loki's son Vali into a wolf, who then attacks and slays Loki's other son Narfi. The gods bind him in the cave and place a serpent to drip venon into his wounds.
Loki's wife Sigyn is described in Norse mythology. Her name is thought to derive from Old Norse sigr, meaning "victory".
In the Prose Edda, Skaldskaparmal describes Sigyn is a goddess. In the Poetic Edda, the poem Voluspa describes Sigyn's role in Loki's imprisonment.
- Deities and Demigods (3e) (2002), p.183.