Scylla
A beautiful sea nymph beloved by Glaucus, who she rejected, in his despair it occurred to him to consult the enchantress Circe. To which Circe replied, "if she scorns you scorn her; meet one who is ready to meet you half way, and thus make a due return to both at once." To these words Glaucus replied, Sooner shall trees grow at the bottom of the ocean, and sea-weed on the top of mountains, than I will cease to love Scylla, and her alone."
The enchantress was indignant, but she could not punish him, neither did she wish to do so, for she liked him too much; so she turned all her wrath against her rival, poor Scylla. She took plants of poisonous powers and mixed them together, with incarnations and charms. Then she passed through the crowd of gambolling beasts, the victims of her art, and proceeded to the coast of Sicily, where Scylla lived. There was a little bay on the shore to which Scylla used to resort, in the heat of the day, to breathe the air of the sea, and to bathe in its waters. Here the enchantess poured her poisonous mixture, and muttered over it incantations of mighty power. Scylla came as usual and plunged into the water up to her waist. What was her horror to perceive a brood of serpents and barking monsters surrounding her! She tried to run from them, and to drive them away; but as she ran she carried them with her, and when she tried to touch her limbs, she found her hands touch only the yawning jaws of monsters. Scylla remained rooted to the spot. Her temper grew as ugly as her form, and she took pleasure in devouring hapless sea mariners who came within her reach. Finally she was turned into a rock, and as such still contiues to be a terror to mariners.
Mythopoeia "The Making of Myths" | The Immortals | Story