Watch La Marca del Hombre Lobo
This 1967 horror film, directed by Enrique L. Eguiluz, features Paul Naschy as a distraught man inflicted with lycanthropy (the fictional disease that, in myth, is believed to turn people into werewolves) who must struggle with his newly awakened and primal appetites. Naschy stars as Waldemar Daninski, the aforementioned werewolf, who, upon realizing the deadly cloud under which he is now living, sets out to find a cure for his affliction. His journey takes him into the heart of the occult and to a store that is run by self-proclaimed initiates. However, Daniski quickly realizes that those who pretend to be out for his best interests are out for much, much more - namely, his blood.