"I’ve been trying to figure out what we’re dealing with," Draco said, voice devoid of emotion, "And to do that, I’ve been trying to figure out what Pyrites was doing in that flat. I thought he was trying to create a kind of quasi-time turner, one that could send him back years and years, but to a specific point in Voldemort’s life - hence all his belongings in that circle. But I think he was using one specific item like a rudder - and I don’t know what it was, but it clearly didn’t work - I think it was originally in the ring where you were stood. I think, if you hadn’t been there, I’d have ended up dead instead," Draco swallowed, "I think, we are   when   we are, because the circle used you as that rudder instead, and sent us back to the point where Voldemort used your blood to resurrect himself.