Arcana(1972)

This movie is not a story, but a card game. This is why the beginning is not credible, nor is the ending. You are the players. Play well and win.

A Sicilian widow earns her living as a clairvoyant, in Milan, but she hasn't got any power at all. Her son instead holds supernatural powers and with the help of his mother he becomes a strong sorcerer. But he fails perhaps to understand the real strength he possesses inside and unbinds uncontrolled forces that lead people that surround him to go mad.