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Celtic Mythology is the mythology of the Celts, a group of tribal societies present across Europe during the Iron Age and in Medieval times.
In Toaru Majutsu no Index, Celtic Mythology is used as a base for certain forms of Magic.
Uses of Celtic Mythology in the story
- Fragarach: The sword of Manannan mac Lir and Lugh. When held at one's throat, the sword was said to prevent them from telling a lie, hence its name, meaning 'Answerer'.