To defeat Harry, Voldemort steals the Elder Wand from Dumbledore's tomb. It is the most powerful wand ever created, and he twice casts the Killing Curse on Harry with it. The first attempt merely stuns Harry into a deathlike state. In the chapter "King's Cross", Dumbledore's spirit tells Harry that when Voldemort failed to kill baby Harry and disembodied himself, Harry became an unintentional Horcrux; Voldemort could not kill Harry while the Dark Lord's soul shard was within Harry's body. Voldemort's second Killing Curse also fails because Voldemort used Harry's blood in his resurrection. Voldemort's soul shard within Harry was destroyed because Harry willingly faced death. In the next chapter, "The Flaw in the Plan", it is established that Harry, not Voldemort, became the Elder Wand's true master. In the book's climax, the Elder Wand disobeys the Dark Lord's command and rebounds the curse onto Voldemort, killing him. J.K. Rowling said, the difference between Harry and Voldemort is that Harry willingly accepts mortality, making him stronger than his nemesis. "The real master of Death accepts that he must die, and that there are much worse things in the world of the living."