Well, we all have to wait till the Last Sacrafise (December) and find out for sure. But personally I think that, the prison guards that are watching Rose over- are going to die... Ok I reached a dead end. If 당신 think about it, not many people (Moroi, Dhamphir) have died, apart from the Strigoi and Mason. It doesn't matter who dies really- well to me at least, as long as it's nobody close to Rose!
i think when it says sacrifice i think it mite have somthing to do with rose and dimitri getting back together hopefully :] not someone dieing maybe i dont no really guess will have to wait and find out :)