Norse Mythology

Norse Mythology is the mythology of the North Germanic people around the time of the Viking Age (at its height covering most of northern Europe, much of modern Germany and Austria, and parts of the British Isles), continuing through into modern-day Scandinavian folklore, and following the lives of the Norse gods — the Æsir and the Vanir — and the men whose lives they directly affected.

In the Toaru Majutsu no Index, Norse mythology is often used as a base for Magic.

Etymology
It is important to note that the correct appellation is Norse Mythology, not Viking Mythology. Originally, the word "viking" meant the act of faring overseas and the sailor participating, while in English it denotes a profession meaning something like "pirate". Only a minority of Norsemen were Vikings.

Principles
Like most traditional polytheistic systems, it has no set canon and in some ways resembles a body of customary beliefs more than a set religion. It has been speculated that only chieftains and other wealthy people held faith in the Æsir, while the common farmers believed in land-spirits such as dwarves, trolls and giants.

It is a branch of the Proto-Indo-European mythological tradition, which also spawned the Celtic, Greek, and Vedic pantheons; it's distinguished from those myths, however, by the fact that its gods are not only fallible, but also all mortal. They could, and did, die, as exemplified during Ragnarok, the Norse version of the apocalypse, which ends with most of the gods dead.

Many texts describing Norse beliefs have come down to us, but, aside from a few runic inscriptions and similar fragments, all were written hundreds of years after the turn to Christianity. Consequently it's nearly impossible to tell which stories are "christianized", or how much they are, although academic theories abound. Even ignoring this, another problem arises: since Norse myth has no definitive canon, the myths differ considerably from place to place, according to the time they were written and the purpose they were written for.

Toaru Majutsu no Index: Stiyl SS
The conflict in this sidestory was over several artifacts which were believed to have held the secrets of the Dvergr's skills. The main antagonist, Richard Brave used Magic based on the flaming sword Lævateinn.

Toaru Majutsu no Index: Kanzaki SS
During the events of this sidestory, Kanzaki Kaori fought a variety of adversaries who made use of Magic based on Norse mythology, culminating in a battle with the Valkyrie Brunhild Eiktobel who sought to complete Gungnir.

English Civil War Arc
The group New Light, which made use of Norse-based magic, was involved in transporting the Curtana Original in the lead up to Carissa's coup d’etat. A defensive spiritual item based on Mokkerkalfe at Buckingham Palace also appeared.

Shinyaku Toaru Majutsu no Index
A large part of Shinyaku Toaru Majutsu no Index consists of the protagonists' struggles against the Norse-based cabal GREMLIN.

Figures & Individual Beings

 * Odin
 * Thor
 * Loki
 * Ymir
 * Sigyn
 * Freyja
 * Iðunn
 * Sif
 * Freyr
 * Ullr/Ollerus
 * Jörmungandr
 * Hel
 * Fenrir
 * Útgarða-Loki
 * Bersi
 * Skírnir
 * Víðarr
 * Hildisvíni
 * Hræsvelgr
 * Sleipnir
 * Mokkerkalfe
 * Níðhöggr

Weapons & Artifacts

 * Gungnir
 * Mjölnir
 * Steel Glove
 * Gjallarhorn
 * Dáinsleif
 * Lævateinn
 * The Sword of Freyr
 * Whiting
 * Skíðblaðnir
 * Víðarr's Shoes
 * Gleipnir
 * Tarnkappe
 * Hliðskjálf
 * Brísingamen
 * Loki's Net

Races & Creatures

 * Valkyrie
 * Einherjar
 * Dvergr
 * Alfar
 * Muspell

Other

 * Runes
 * The significance of the number Nine
 * Yggdrasil

Norse-based Organizations

 * GREMLIN (magic cabal)
 * Those Who Prevent the Extermination of the World Tree (magic cabal, destroyed)
 * Iron Stake that Carves Knowledge (magic cabal, destroyed)
 * Champions from the Sea (magic cabal, destroyed)
 * Those who Know the Rune of the God’s Sword (magic cabal, destroyed)
 * Hammer that Tempers Gold within the Earth (magic cabal, destroyed)
 * New Light (cabal reserve army)