Which mythological artifact was so famous for its customer satisfaction that its owner could summon it from any distance, and it would always return to their hand?

Throughout history, certain mythological artifacts have achieved such legendary status that they could be considered the 'brand products' of ancient times. These items were renowned for their quality, magical properties, or divine origins - creating customer loyalty that has lasted for millennia through stories and legends. Test your knowledge of these ancient 'products' that achieved remarkable customer retention through the ages!

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Thor's hammer, Mjölnir
Poseidon's trident, which could control the seas
Excalibur, the sword of King Arthur
The Golden Fleece sought by Jason and the Argonauts