Powers - classified as such instead of gods because wizards dislike feeling small - are transcosmic beings. Which is to say they are not confined to our universe or any of the existing parallel ones. Rather, they each possess their own plane from which they can observe and meddle with others as they see fit. Harry Potter, in a moment of desperation calls on any of them for help.

Many stories make Harry conclude that he's been manipulated. What if Voldemort reached that conclusion? Worse, what if he prompted Harry to do the same? Put more simply, Voldemort encourages Harry to think after presenting the truth in the darkest light possible...