Which mythological 'product launch' was accompanied by a marketing campaign that included sending the item to various gods to test, resulting in the death of the god Baldr?

Throughout mythology and folklore, certain divine or magical items can be viewed as 'product launches' that transformed their worlds. From weapons forged by gods to magical artifacts that granted extraordinary powers, these items were game-changers in their mythological contexts. Test your knowledge about these legendary 'product launches' that shaped the course of mythological narratives across different cultures.

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Mistletoe dart crafted by Loki in Norse mythology
Pandora's Box in Greek mythology
Excalibur sword in Arthurian legend
Golden Apple of Discord in Greek mythology