Possible Clues:

• Medusa was one
• Medusa, for one
• Medusa such a monster
• One of three monsters, sisters with sharp fangs and hair of venomous snakes
• One of the ugly sisters refused a drink when upset
• Snake-haired woman who turned people to stone
• Mythical Greek woman with snakes as hair
• One of the Ugly Sisters refused drink on return
• She had the power to turn people to stone
• In Greek myth, a snake-haired woman whose look turned people to stone