Mother of Tears, the final entry in Dario Argento's "Three Mothers" trilogy, has one thing going for it, and that's an evil monkey who's a total asshole. Aside from that, it's a disappointing finale for a trilogy that, while not perfect, at least included some of the most striking imagery ever seen in horror. Mother of Tears fails in that respect too. (Although, if naked witch boobs is all you really want in the way of "striking imagery," I supposed you could deem the movie a success.)
Truth be told, I never really paid much attention to the mythology behind the trilogy, and just what's up with those Three Mothers, because like I said, I was too busy being awed by the look of those first two films, Suspiria and Inferno, to pay much attention to any explanations there may have been. So maybe Mother of Tears actually does make some sense to people who are less distracted by pretty pictures than I am. And maybe it would have benefited from a viewing immediately following the first two. But as it was, I pretty much gave up trying to figure everything out at about the time Udo Kier shows up as a priest.
Mother of Tears is available to rent from Amazon Prime and Vudu.