Another one I've been working a bit. Have at you.
I do agree with shadowox8 with the mannequins part. Sounds a bit like Talking Tina mixed with zombies. I DO think, however, that you could maybe change it to a sort of monster that when it kills something, it adds you to it. Thus making a sort of random abomination that grows in size. Kind of like the growing cog machine that takes in any metal piece, but with organic material instead…and keter.
On the draft, I kind of think it tells you too much in some places, and not enough in others. For example, one question that popped in my mind was "is this store on a town block?" How would soldiers kill everyone anyone that came near it?
Otherwise, I kind of liked it! =) You could turn this into something really awesome! it's cool to see an SCP that it's only really a threat if someone goes into it and not just blood and guts, blood and guts. Hope I helped!
a sort of monster that when it kills something, it adds you to it.
Not entirely the same, but similar. I'm not sure how harshly your suggestion would be criticized in light of it, but I doubt it would go well.