
Originally Posted by
Dobby
The Horcrux held Voldemort to Harry and the Blood held Harry to Voldemort.
When Voldemort hit Harry with the AK Harry lived because his blood was still alive in Voldie. The fragment of soul however did not survive. The AK wouldn't have killed Harry anyway as it had been cast using the elderwand. The Horcrux link is broken.
When they battle in the great hall Voldies AK back fires but as it is cast by the elder wand it only kills Voldie and not the part of Harry that is in his blood as it will not attack its true owner. The blood link is broken.
Does that make sense?
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