"If you take out all the bullshit about the machines and the crappy prophecy, The Matrix was pretty close to the truth. Just think about it for awhile and you'll see how much sense it makes. And really, if you were trapped in a game and couldn't wake up, wouldn't you want to know the truth? So you could do something about it?"
" . . . Still haven't convinced you, huh? Here, tell you what: I'll give you my card. Whenever you feel like learning the real truth of this world, give me a call. I'll show you the ropes."
A shape-shifter of some sort has taken up a post at the War College of an enemy realm, where he secretly picks off only the most promising officer cadets, arranging bizarre accidents that gradually debase the leadership of the hostile army. In the long run, this will improve his nation's chances when the inevitable conflict comes.
As a shape-shifter he can impersonate superiors and peers alike and send the target candidate to the cleverly-prepared site of his (or her?) execution. As long as he is successful, no-one will ever know about the deception--even necromancy will only implicate the one impersonated...