In Norse mythology, Frey's son Frodi is given a magic grindstone from the fairies and elves. One who grinds the stone and sings shall get whatever they wish. Unable to move the large stone, Frodi takes two Giantesses as prisoners: Menia and Fenia. They grind gold for Frodi until he falls asleep. Then they grind soldiers to fight him.

Frodi's Grindstone

In Norse mythology, Frey's son Frodi is given a magic grindstone from the fairies and elves. One who…

A flat circular stone used for grinding or sharpening tools.

Grindstone

A flat circular stone used for grinding or sharpening tools.

"Argent, a millrind, gules. MILLRIND. The iron placed in the centre of a grindstone to protect the hole in the centre from the action of the axis; it is a charge frequently borne on escutcheons of persons connected with agriculture." -Hall, 1862

Millrind

"Argent, a millrind, gules. MILLRIND. The iron placed in the centre of a grindstone to protect the hole…