It might take every last one of them to do it, but they're willing to.
I want to crush every last piece of it.
The Original Other can slaughter every last vamp on the planet.
Only when every last lingering fleck of blood was gone did her ability to think return.
In any case, Darkyn.s demons are planning to invade the castle, where your sweet little morsel is, so they can slaughter every last annoying Immortal.