What would happen, if a single Culexus Assassin miraculously found himself/herself on Holy Terra, inside the Imperial Palace, within the Throne Room infact.
I mean, the Emperor's one, post-expiration-date super-psyker, right? Wouldn't he or the Golden Throne somehow be influenced by the presence of the Pariah-gened Assassin?
What if there were more than one assassin, a bunch of them -- hell, hundreds!?