Argus Panoptes
Jupiter (Zeus) falls in love with Io, a priestess of Hera, his wife, who quickly discovers the affair. Jupiter transforms himself into a bull and transforms Io into a beautiful, white heifer in order to hide from Hera's wrath. Hera understands his strategy and demands the heifer as a present. To end their affair, Hera puts Io under the guard of the giant Argus Panoptes, who has 100 eyes. Jupiter commands his son Mercury (Hermes) to set Io free by lulling Argus to sleep with an enchanted flute. Mercury, disguised as a shepherd, is invited by Argus to his camp. Mercury charms him with lullabies and then cuts his head off