Fenrir, unfortunately for the Æsir and Vanir, turned out to be one of the many foreshadowing signs of the end of the Norse world: Ragnarök.Īccording to Snorri Sturluson's Prose Edda, Fenrir's tale begins, as any tale should, with his unlikely and terrible birth. A wolf of remarkable size and strength, Fenrir has one major story recorded in the Norse sagas, yet this singular story paints a picture of bravery for one god and an omen of death for the rest of them. One of the three children of Loki by a giantess (jötunn) named Angrboða, Fenrir plays an imperative, though short, role in Norse mythology.