As before, I come to you in my need of advice regarding the Evil Deeds of a Game Master.
For you who is not aware of the situation, I am the GM of a Dark Heresy game where I lead my dear friends, and Catty, into certain doom, and then sit and laugh as they try to survive.
Well, they have done a fine job surviving, and even though I have managed to remove an arm from one of them, they still fight onward. After their current mission (a devious prison break), they will reach the 7th rank (of 8 in total). That means I will have about two missions left before they are ascended to the Inquisitor rank, and the game will be over. And I can't let that happen, now can I? Not without a fight anyways.
Here's my problem. I don't know what I shall throw at them to challenge them enough to maybe kill, or at least maim, some of them, but not making it impossible for them to succeed (I'm not completely without heart. It's just a black crusted little thing...

I have a couple of ideas:
1. Chaos Space Marines.
Putting them against the Fallen Space Marines would truly challenge them! But with superhuman physique, power armor, astartes weapons, chaos powers and Emperor knows what else, it may be a bit to much.
Alternative: I thought about a group of heretics that had awoken a Chaos Dreadnought. That way, they could have low level enemies, but with a high level end boss. But how could they ever take on a Chaos Dreadnought..?
2. Necrons.
An awoken Necron Tomb? Yay! Now there's a fun enemy! But the mission would be more about surviving, than defeating the Necrons.. And seriously, how big chance do they have when meeting one or more Necrons..?
3. A Cell of Slaught Infiltrators/Warriors.
Yes. I would do that. Yes. I am Evil.
But as I said, it would be more fun for them if they had a chance of surviving...
So what do you say? Do you have any ideas, or pointers? As I said, an extremely deadly challenge, but not impossible.
I do want them to keep playing with me.. (So that I can try and kill them again!
