text: To defeat Harry , Voldemort steals the most powerful wand ever created , the Elder Wand , from Dumbledore 's tomb and twice casts the Killing Curse on Harry with it .
simplified: 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 .