Originally posted by Prometheus878
I was just thinking about something like this.
Since the fully inducted members of the Immaculate Order know that Solars and Lunars aren't shiny demon-kings but doomed heroes, would it make sense story-wise (albeit unprecedented and outrageous to all who hear of it) for an Immaculate leader to make common cause with an Anathema against something truly horrible? After it has become plainly evident that the Anathema in question isn't going anywhere any time soon, of course.
I'd expect this to result in expulsion from the Order for heresy.