"Let go of them. Now.
Don't give me that crap about how you're waiting for the sweet embrace of death, to better feel the eternal pleasures of the warp.
You're alive now, and living is the ultimate addiction- can't you feel it? You tell yourselves that you can stop anytime you want, but one last breath is never enough, is it? The feel of a cool breeze on your skin, the subtle scent of sweat, the feel of cloth against your skin? Nothing in the immaterium can compare to living- it's why you bastiches are so eager to get your claws into this domain.
I'm not going to threaten you with death if you don't leave these bodies- oh no, that's more the Sisters style. I realize that even if living flesh is a great addiction, you're willing to settle with a runners up prize.
Instead, I'm going to make sure that you live.
I'll make sure that you live, in nothingness.
Devoid of all sense, of all bereft of even the sweet tang of pain.
Pitch blackness constantly, no sound, no light, no color, no hope, not even a faint connection to the warp, just an eternity of nothingness.
It wouldn't be easy- sensory deprivation tanks, nerve destruction, immaterium hexes- but I am dead serious when I say that I can do it, and that I will do it, if only to spite you.
So release the souls of these women, or I will make sure you live.