Harry Potter and the Half-Blood Prince
One night, Dumbledore and Harry go out to a cave area. Dumbledore thinks there is another Horcrux there. After getting there, they find a goblet. Dumbledore drinks the entire potion, which makes him dizzy. They find the locket and go back to Hogwarts, where they find that the Death Eaters and Malfoy have attacked. They take broomsticks and land at the top of one of the towers. Malfoy bursts where Harry and Dumbledore are. Harry is hiding under an invisibility cloak. Soon, other Death Eaters come up, but Malfoy cannot kill Dumbledore as Voldemort ordered him to do. Snape comes up and kills Dumbledore.