Hércules y la captura de Cancerbero 《 ultimo trabajo 》 ️Cancerbane is a mythical monster in Greek legends. It is often depicted as a multi-headed canine protecting the gates of the underworld. According to some legends, Cancerbero has three heads, while in others it can have a maximum of nine separate heads. The term "cancerbero" is additionally used to refer to a fierce and unyielding guardian.