Dumbledore locates a Horcrux and asks Harry for help destroying it. They travel to a cave and retrieve what they believe to be Salazar's locket, but Dumbledore is severely weakened after drinking the magical potion that protects the Horcrux. They return to Hogwarts and see Voldemort's symbol hovering over Hogwarts's Astronomy Tower. At the top of the tower, Dumbledore is confronted by Draco. Draco admits that he was behind the attacks on Dumbledore's life, as Voldemort had ordered Draco to kill him and would kill Draco if he failed, but he cannot bring himself to kill Dumbledore on the spot. However, Snape arrives and kills Dumbledore. Enraged, Harry pursues Snape, who fends off Harry's attacks and reveals that he is the Half-Blood Prince shortly before disapparating.
Harry recovers the locket from Dumbledore's body, only to discover that it is a fake left by someone with the initials R. A. B., who stole the real Horcrux and left a note declaring his opposition to Voldemort. The school year ends with Dumbledore's funeral; he and his wand are buried in a tomb beside the lake on Hogwarts' grounds. After the funeral, Harry breaks up with Ginny, fearing that Voldemort will target her if they continue to see each other. He, Ron, and Hermione decide not to return to school the following year, but to hunt for the remaining Horcruxes instead.
