This is another theory on how harry survived voldemorst death curse in the 7th book. I ask you to correct me if im wrong and explain why because I followed this with interest as I was reading through the seris and came to this conclusion.
Dont ridicule me if im off the radar wrong. This is only a theory.
Many people say that he was the master of death weilding all 3.
Many people say that it was because in the 4th book the blood of harry was in voldemort. So as long Voldemort is alive. Harry is alive.
Another theory would derive from the 3rd book.
Harry saved peter Pettigrew from sirius black in the shreaking shack. Giving Peter Pettigrew a life debt to harry.(Albus even says that Peter Pettigrew and Harry shared a bond in this matter and Harry would find this bond useful someday and that this is magic in its most powerful form). We can predict that because if it werent for Harry? Pettigrew would be dead. And that ultimate debt is that Petegrue cannot kill harry due to this bond. When voldemort came back from the dead. It was because Pettigrew had givin a limb in the revival of Volemort. Meaning! That because the blood of a man who is in that debt to harry is now in Voldemorts veins.)
"Pettigrew owes his life to you. You haev sent Voldemort a deputy who is in your debt....When one wizard saves another wizards life, it creates a certain bond between them and im much mistaken if Voldemort wants his servant in the debt of Harr Potter."
"This is magic at its deepest, its most impenetrable, Harry. But trust me... The time may come when you will be glad you saved Pettigrews life."