Nordic mythology in the context of "Loki"

Æsir (Old Norse; singular: áss) or ēse (Old English; singular: ōs) are gods in Germanic paganism. In Old Nordic religion and mythology, the precise meaning of the term "Æsir" is debated, as it can refer either to the gods in general or specifically to one of the main families of gods, in contrast to the Vanir, with whom the Æsir waged war, ultimately leading to a joining of the families. The term can further be applied to local gods that were believed to live in specific features in the landscape – such as fells. The Old English medical text Wið færstice refers to the Ēse, along with elves, as harmful beings that could cause a stabbing pain, although exactly how they were conceived of by the author of the text is unclear.

Áss and its cognate forms feature in many Germanic names, such as Oswald and Ásmundr, and in some place-names in Norway and Sweden. The Æsir further likely give their name to the A-rune, attested in the Elder Futhark, Anglo-Saxon Futhorc and Younger Futhark.

In Germanic heroic legend and folklore, Fáfnir, was a dwarf or other type of humanoid, who had shifted into the hamr of a Germanic dragon (a worm, "serpent", in period nomenclature), in order to protect a treasure, and then was slain by a member of the Völsung family, typically Sigurð.

In Nordic mythology, he is the son of Hreiðmarr, and brother of Regin and Ótr. He is attested throughout the Völsung Cycle, where, Fáfnir commits patricide out of greed, taking the ring and hoard of the dwarf Andvari, and shapeshifting into a dragon. Fáfnir's brother Regin later assisted Sigurð in obtaining the sword Gram, by which Fáfnir is killed. Fáfnir has been identified with an unnamed dragon killed by a Völsung in other Germanic works, including Beowulf, the Nibelunglied and a number of skaldic poems. Fáfnir and his killing by Sigurð are further represented in numerous medieval carvings from the British Isles and Scandinavia, and a single axe head in a Scandinavian style found in Russia. The story of Fáfnir has continued to have influence in the modern period, such as in the works of J.R.R Tolkien, who drew inspiration from the tale of Fáfnir in his portrayals of Smaug and Gollum.

Völsung (Old Norse: Vǫlsungr [ˈvɔlsuŋɡr̩], Old English: Wæls) is a figure in Germanic mythology, where he is the eponymous ancestor of the Völsung family (Old Norse: Vǫlsungar, Old English: Wælsings), which includes the hero Sigurð. In Nordic mythology, he is the son of Rerir and was murdered by the Geatish king Siggeir. He was later avenged by one of his sons, Sigmund, and his daughter Signy, who was married to Siggeir.

Völsung's story is recorded in the Völsung Cycle, a series of legends about the clan. The earliest extant versions of the cycle were recorded in medieval Iceland; the tales of the cycle were expanded with local Scandinavian folklore, including that of Helgi Hundingsbane (which appears to originally have been part of the separate tradition of the Ylfings), and form the material of the epic poems in the Elder Edda and of Völsunga saga, which preserves material from lost poems. Völsung is also the subject matter of the Middle High German epic poem Nibelungenlied and is referred to in the Old English epic Beowulf.

In Nordic mythology and folklore, Old Norse: hamr (Danish: ham; Faroese: hamur; Icelandic: hamur; Norwegian: ham; Swedish: hamn), in later periods, mainly rural folk belief, is a shroud, shape, form, figure, in which the hug (Old Norse: hugr), the 'mind, spirit', could manifest itself outside the body during a dream or an ecstasy. Compare apparitional experience and vision (spirituality). It is further a form of magical transformation that occurs with shapeshifting. Such could be used for disguise or as a tool.

The word also exists in English as hame and heam, from Old English: hama, meaning "shroud, casing, covering, skin, membrane".

The terms Jötunheimr (in Old Norse orthography: Jǫtunheimr [ˈjɔtonˌhɛimz̠]; often anglicised as Jotunheim) or Jötunheimar refer to either a land or multiple lands respectively in Nordic mythology inhabited by the jötnar (relatives of the gods, in English sometimes inaccurately called "giants").

Jötunheimar are typically, but not exclusively, presented in Eddic sources as prosperous lands located to the north and are commonly separated from the lands inhabited by gods and humans by barriers that cannot be traversed by usual means.