I am Inquisitor Soviatus. I have been investigating Black Library publications for 5 years now. My investigation has also taken me into the world of DoW and Space Marine. I have read so many of the Astartes books I have lost count. WH40k is the only literature that is worth reading. There is only the Emperor and He is my shield as I am His sword.
You find yourself outmatched, Inquisitor. For the one weapon you have amongst your kind which grants you power is cunning. Alas, the most cunning of you primitives is still no match for a child of ours. So, may you find a good pit to hide in when the Warhost comes to end your poor, confused existence. Don't fear; your death will be a beautiful and quick one. Perhaps you will realise the folly of resisting us in death, for it seems life has so cruelly denied you that knowledge.
The moment you think you've won is when you hear the crackling in your ears just before the orbital lance strike hits the bulk of your forces and turns them to ash. Many craftworlds will be put to the Exterminatus.
Commendable effort, but futile. For we would never make such a foolish mistake as to remain in one place. Our way is of war isn't like yours - sluggish, slow and barbaric. Nay, ours is a more refined art of death. Something as beautiful as it is deadly.
Nothing is more beautiful than watching our honorable brother dreadnoughts grab hold of a xenos and burn the flesh from its helpless body.
Greetings Inquisitor. The Grey Knights will stand beside you in your battle against the enemies of man.