Argento initially wanted to make a Three Mothers Trilogy, movies about 3 powerful witches that cause evil and chaos in the world. His first two movies, Suspiria and Inferno, are absolute masterpieces with wonderful acting and atmosphere. Very bizarre films. He never completed this trilogy. In came Luigi Cozzi, who completed the trilogy with Demons 6 aka the Black Cat. Though not as good as the first two, this movie is definitely a masterpiece that is worthy of praise. Nice midnight like atmosphere and good gore, good acting, a spooky movie. What more can you want? Too bad it is not available in the US, but there is one company that sells it on DVD, uncut, direct from a Japanese transfer source, with English audio and forced Japanese subs.