I somehow stumbled upon a post talking about HP fanfic squicks, and attracted in these fics, I can’t help but want to read it! Sick, I know.
A google search was unfruitful. In fact, there was little to nothing to be found on google, except a comment on a LiveJournal community about it, and find another similar book - Cannibalism, Headhunting and Human Sacrifice, don’t know if it’s worth to go, any feedbacks about it?
Or any other specifc fics suggestions?
So let me get this straight, since your post is a little confusing:
Are you looking for HP fanfic? Or research about human sacrifice? Or HP fanfic about human sacrifice?
Us Dopers are generally glad to help folks out, but mind-reading ain’t our greatest skill. 
I’m sorry to make you confused.
i am looking for HP fanfic about human sacrifice, thanks
Off topic, but there is a definate shortage of Lucy/Ethel slash fiction on the 'net.
I can’t help you, but this forum might. In fact, there’s a pretty good chance someone has already asked for it.