One Ring

"The One Ring, also called the Ruling Ring and Isildur’s Bane, is a central plot element in J. R. R. Tolkien‘s The Lord of the Rings (1954–55). It first appeared in the earlier story The Hobbit (1937) as a magic ring that grants the wearer invisibility. Tolkien changed it into a malevolent Ring of Power and re-wrote parts of The Hobbit to fit in with the expanded narrative. The Lord of the Rings describes the hobbit Frodo Baggins‘s quest to destroy the Ring. Critics have compared the story with the ring-based plot of Richard Wagner‘s opera cycle Der Ring des Nibelungen; Tolkien denied any connection, but at the least, both men drew on the same mythology. …“

Wikipedia

A Weapon With a Will of Its Own: How Tolkien Wrote the One Ring as a Character

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