Those who Know the Rune of the God’s Sword

Those who Know the Rune of the God’s Sword (神の剣の文字を知る者) was a Norse Magic Cabal, one of five who united to attack Brunhild Eiktobel's cabal and were subsequently destroyed by her in revenge.

Background
Five years ago, Those who Know the Rune of the God’s Sword, together with Those Who Prevent the Extermination of the World Tree, the Iron Stake that Carves Knowledge, Champions from the Sea and the Hammer that Tempers Gold within the Earth, attacked Brunhild Eiktobel's cabal out of fear that her nature as a Saint and Valkyrie would cause pure Norse-style magic to go into decline.

Toaru Majutsu no Index SS: Kanzaki
Those who Know the Rune of the God’s Sword was noted to have been active recently by the Tour Guide, around the time of the bombings carried out by the magician Leasic. The cabal was attacked by Kanzaki Kaori who was investigating the attacks on various Norse cabals and subsequently crushed by Brunhild as part of her revenge against the five cabals.