The Black Cloud is a mysterious entity that sweeps the land and causes entire castles to disappear. It swallows up Fantaghirò and Parsel's castles, which are taken away.

The origins of the Black Cloud are traced to the kingdom underneath a dormant volcano, sent by the powerful wizard Darken. It was part of an elaborate spell sent by Darken to bring his son, Tarabas, back to evil after he had been reformed.