Finger of doom (1972)

This creepy kung fu film fight-fest centers on the evil Madame Kung Sun and her poisonous "Finger of Doom", a unique supernatural power which allows her to transform normal, everyday people into horrifying zombies! In the face of this devastating talent, only one person has the guts to stop Madame Kung Sun in her chilling bid for martial arts supremacy - the villainess' own sister. But it's not something she can do alone, so this heroic young woman joins forces with three world-weary martial artists, The brothers-in-arms were actually looking to retire from the world of Jiang Hu, but now find themselves thrown back into the mix, embarking on one last mission to save the world from machinations of the venomous Madame Kung Sun!