Feels like a bit of a wasted idea. Moore supposedly wrote this to pay the bills, which is hard to not think you notice at times, but even if it's hard to find a new twist on the Cthulhu mythos he does manage to insert a few Moore-ish details, and leads up to an apocalyptic ending that feels like a decent (or indecent) conclusion. He also inserts a very drawn-out rape scene at the heart of everything that makes the story as a whole feel less dark and shocking than it feels nasty and tired.