Sphinx: Sphinx (1978)
Under the name Sphinx, Alec R. Costandinos and Don Ray released an album with two side-long tunes, Judas Iscariot and Simon Peter, telling the story of the betrayal of Christ. Judas features some monk-like chanting, and a pretty simple ascending and descending theme, but as usual it goes through a bewildering series of tranformations, including what sounds like a bouzouki duel, before climbing to a rousing finale. It's also a good case study in how Costandinos keeps the rhythm section pumping out dance beats no matter how overwrought the orchestra gets. Simon Peter explores similar territory and about seven minutes in, it breaks into the most furious, kick-ass disco you're ever going to hear.
Much like Costandinos' work with Cerrone on Love in C-Minor, I was initially unaware of Don Ray's contributions to this album, but upon subsequent listening it's obvious.
And no doubt because of the subject matter, I don't recall ever hearing it played in the clubs. I only stumbled upon it because it appeared in a full page ad in Billboard Magazine along with Costandinos' other work.