Canserbero Porta Hay un Sentimiento muerto en un corazón Cerberus' hound is a mythical beast in Greek legends. Its portrayal often shows it as a multi-headed canine protecting the gates of Hades. In some myths, Cancerbero owns three heads, while in others it can have as many as nine heads. The word "cancerbero" is additionally used to refer to a fierce and unrelenting guardian.