A magic ring is a ring, usually a finger ring, that has magical properties. It appears frequently in fantasy and fairy tales. Magic rings are found in the folklore of every country where rings are worn. Some magic rings can endow the wearer with a variety of abilities including invisibility and immortality. Others can grant wishes or spells such as neverending love and happiness. Sometimes, magic rings can be cursed, as in the fictional ring that was recovered by Sigurd from the hoard of the dragon Fafnir in Norse mythology or the fictional ring that features in J R R Tolkien's modern saga The Lord of the Rings. More often, however, they are featured as forces for good, or as a neutral tool whose value is dependent upon the wearer.
A finger ring is a convenient choice for a magic item: it is ornamental, distinctive and often unique, a commonly worn item, of a shape that is often endowed with mystical properties (circular), can carry an enchanted stone, and is usually worn on a finger, which can be easily pointed at a target.
Early stories of magical rings date to classical antiquity. Plato, in the second book of The Republic, tells a story about the Ring of Gyges, which conferred invisibility on its wearer. The shepherd Gyges, who found it in a cave, used its power to seduce the queen, kill the king and take his place. Earlier accounts of Gyges, however, who was king of Lydia, make no mention of a magic ring. Rings are not generally attributed with magic powers in ancient Greek legend, although many other magical objects are listed, particularly in the Perseus myth. Josephus (8.2) has an anecdote of one Eleazar who used a magic ring to exorcise demons in the presence of Vespasian.