User blog comment:The Milkman/The Writing of the Ending/@comment-24174486-20120726200543/@comment-4237253-20120822113056

A dues ex machina doesn't always have to be a god. Also, its rule in the story was not foreshadowed enough. There is some vague description that might not even be about the Catalyst tucked away in the description of one planet. That does not foreshadow the Catalyst's role in the story.