Death of Albus Dumbledore

The death of Albus Dumbledore is the catastrophic climax of Harry Potter and the Half-Blood Prince, the moment that transforms the series from a story of hidden threats and schoolboy mysteries into an open war. It is not a death in battle against Lord Voldemort, but an execution on the school's own highest tower, carried out by the man Dumbledore had trusted most: Severus Snape. The event shatters the protective illusion that Hogwarts is a sanctuary, confirms Snape's treachery in the most brutal way possible, and forces Harry to accept that he must walk the path Dumbledore laid out for him entirely alone.

The Trap and the Confrontation

Dumbledore and Harry return from the seaside cave, where Dumbledore has drunk a terrible potion to retrieve what he believes is a Horcrux, leaving him desperately weak. As they Apparate into Hogsmeade, Madam Rosmerta points out the Dark Mark floating over the Astronomy Tower. Dumbledore, rallying himself, flies them to the ramparts. There, he orders Harry to fetch Snape, but before Harry can obey, the door bursts open and Draco Malfoy erupts through it, disarming Dumbledore with a shouted "Expelliarmus!" Dumbledore, however, has already immobilized Harry with a silent spell, propping him against the wall as a helpless witness. Malfoy reveals that he has spent the year mending a Vanishing Cabinet in the Room of Requirement to create a passage for Death Eaters from Borgin and Burkes into the school. Dumbledore, despite his weakness, speaks to Malfoy not as an enemy but as a misguided boy, telling him, "You are not a killer." He offers Malfoy protection, a way out, but Malfoy hesitates, his wand hand shaking. Before he can decide, four Death Eaters — Amycus and Alecto Carrow, the werewolf Fenrir Greyback, and the brutal-faced Thorfinn Rowle — burst onto the tower. They urge Malfoy to act, but he cannot. Then Snape arrives.

The Murder

Snape pushes past Malfoy roughly. The other Death Eaters fall back. Dumbledore, who has slid down the rampart wall, looks up at Snape and speaks his name softly, pleadingly: "Severus… please…" Snape raises his wand, his face etched with revulsion and hatred, and points it directly at Dumbledore. He utters the words "Avada Kedavra!" A jet of green light hits Dumbledore square in the chest, blasting him into the air. For a split second he hangs suspended beneath the shining green skull, then falls backward over the battlements like a great rag doll, out of sight. Harry, still paralyzed, screams silently. The spell Dumbledore had placed on him lifts only when the caster dies, confirming the horror: Dumbledore is gone.

The Aftermath and the Flight

Snape seizes Malfoy and forces him through the door, followed by the other Death Eaters. As the last one disappears, Harry finds he can move again. He Petrifies the rearmost Death Eater and gives chase, running through the battle-torn corridors where the Order of the Phoenix is fighting. He sees Ginny, Ron, Hermione, Neville, Lupin, Tonks, and McGonagall all engaged in combat. He pursues Snape into the dark grounds, past Hagrid's burning cabin, and finally confronts him. Snape deflects every curse Harry throws, taunting him. When Harry screams "Sectumsempra!" — the very spell he learned from Snape's old textbook — Snape reveals himself as the Half-Blood Prince, the inventor of the curse. He disarms Harry and stands over him, wandless and defenseless as Dumbledore was. But instead of killing him, Snape screams, "DON'T — CALL ME COWARD!" and slashes a deep wound across Harry's face before fleeing. Buckbeak the hippogriff attacks Snape, but he Disapparates just beyond the school gates. Harry is left alone, bleeding, beside the burning cabin, knowing that the man he trusted has murdered the man he loved.

The False Horcrux and the New Burden

Harry returns to the foot of the Astronomy Tower, where Dumbledore's body lies broken on the grass. He kneels beside him, straightens his half-moon spectacles, and wipes blood from his mouth. Then he finds the locket they had risked so much to steal, fallen from Dumbledore's pocket. It is open. Inside is not a Horcrux but a scrap of parchment bearing a message: "To the Dark Lord, I know I will be dead long before you read this but I want you to know that it was I who discovered your secret. I have stolen the real Horcrux and intend to destroy it as soon as I can. I face death in the hope that when you meet your match you will be mortal once more. R.A.B." The realization that Dumbledore weakened himself and died for nothing is a second, almost unbearable blow. Harry crumples the note, his eyes burning with tears, as Fang the boarhound begins to howl.

The Funeral and the Resolution

Dumbledore's funeral is held on a beautiful summer's day by the lake. The body, wrapped in purple velvet spangled with golden stars, is carried by Hagrid and placed on a marble table. Merpeople sing from the water; centaurs fire a shower of arrows from the forest. White flames erupt around the body, rising into the shape of a phoenix, and then vanish, leaving a white marble tomb. As the crowd disperses, Harry tells Ginny they cannot be together, because Voldemort will use her to get to him. He tells Ron and Hermione that he will not return to Hogwarts, that he must track down and destroy the remaining Horcruxes, and then kill Voldemort. Ron and Hermione insist on coming with him. Harry's hand closes around the fake Horcrux, but for a moment, his heart lifts at the thought of one last golden day of peace at Bill and Fleur's wedding before the dark path ahead.