Frases de Canserbero LĂricas Profundas e InolvidablesCerberus is a mythical beast in Greek mythology. Its portrayal often shows it as a multi-headed dog guarding the gates of the. In some myths, Cancerbero has three heads, while in others it can have as many as nine separate heads. The term "cancerbero" is also used to refer to a fierce and unrelenting guardian.