While Manitou does have its slower sections, the climax is a thing of beauty to be enjoyed forever, with crummy special effects, bad lightning, a star field, an Evil One symbolized by a cataract, and Tony Curtis struggling to maintain his dignity.
The special effects are superb, easy winners in an engaging inter-denominational free-for-all that blends Marvel Comics' Doctor Strange with Corman's The Raven. A successful excursion, spoiled only by the director's habit of plopping in postcard views of the Golden Gate Bridge instead of exteriors.
This is silly stuff, and the gooey special effects make it ever sillier. Director Girdler--who died in a helicopter crash before the film was released--does a respectable job of making it all look rather slick and professional, but the big budget and all-star cast only add to the overall absurdity.