Which mythological artifact was specifically created as an innovative solution to help its owner navigate safely through a labyrinth, demonstrating ancient 'product development' to solve a specific challenge?

Throughout mythology and folklore, gods and heroes created or possessed legendary items with extraordinary powers - essentially the product innovations of their time! These divine artifacts represent some of the earliest examples of how 'product development' solved problems, even in mythological contexts. Test your knowledge of these ancient 'innovative products' that have influenced culture and storytelling for centuries.

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Ariadne's Thread - created specifically to solve the Labyrinth navigation problem for Theseus
Thor's Hammer (Mjölnir) - crafted by dwarves as a weapon that would always return to its owner
The Golden Fleece - a magical artifact sought by Jason and the Argonauts for its healing properties
Excalibur - the legendary sword pulled from stone that proved Arthur's right to rule