Friday the 13th, According to folklore the unlucky nature of the number "13" originated with a Norse myth about 12 gods having a dinner party in Valhalla. The trickster god Loki, who was not invited, arrived as the 13th guest and arranged for Höðr to shoot Balder with a arrow.

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CDChallenge March: Norse Gods

Höðr with Loki's snakes

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