Medea (1969)

On a quest to retrieve the fabled Golden Fleece, Jason and the Argonauts arrive at a remote barbarian land where the natives worship the sacred artefact to protect the crops. But, unexpectedly, as Medea--a beautiful high priestess and the land's powerful sorceress--betrays her beliefs to follow Jason back to Greece, a cruel fate awaits her. As a result, deserted and banished by the king, it's only human that Medea plots her furious revenge. Can they escape her wrath?