The Amulet of Ogum(1974)

Original title: O Amuleto de Ogum

An ubiquitous folk singer narrates the tale of a young boy, who apparently becomes immune to gunfire after his mother arranges for him to have an amulet bearing Ogum's blessings. As time goes by, he becomes a valuable member of a mobster's hit-team, but ends up joining a group of people who resist his original employers.