Voldemort's Last Stand

A duel between Harry Potter and Lord Voldemort at near the end of the Battle of Hogwarts on May 2, 1998.

Background
After Harry Potter witnessed the death of Severus Snape, he took the flask of Snape's memories to Albus Dumbledore's Pensieve and, by the end of the memories, Harry realized that Snape was a loyal Order of the Phoenix and he, Harry, was a Horcrux. He went on to face Lord Voldemort, who inflicted him with the Killing Curser, destroying his own Horcrux.

The Battle
Believing Harry to be dead, Voldemort brought the Chosen One before the Hogwartians. Angered, Neville Longbottom ran at Voldemort and decapitated Nagini with Godric Gryffindor's sword. This began the battle, and it didn't end until the death of Bellatrix Lestrange, in which Harry revealed himself.

The Duel
"There are no more Horcruxes. It's just you and me. Neither can live while the other survives and one of us is about to leave for good."

- Harry Potter to Lord Voldemort

As soon as Harry revealed himself, he and the Dark Lord began to circle each other. Harry said to Voldemort that one of them was to die in the duel. Voldemort expressed his belief that Harry would die. Harry explained to him that Albus Dumbledore's death was planned between the former Hogwarts headmaster and Snape, that way the Elder Wand's power should have died with him. Unfortunately, Draco Malfoy Disarmed Dumbledore, making him the true master of the Elder Wand. Voldemort said he would just kill Draco, but then Harry added that he Disarmed Malfoy, making him the true master of the Elder Wand. So, then, Harry shouted Expelliarmus!, at the same time as Voldemort screamed Avada Kedavra!. The Elder Wand refused to kill its master, so it flipped over and Harry caught it. The rebounding Killing Curse hit Lord Voldemort, and Tom Marvolo Riddle was dead.

Aftermath
After the death of Lord Voldemort, Harry returned the Elder Wand to Dumbledore's tomb, kept the Cloak of Invisibility, and left the Ressurrection Stone buried in the Forbidden Forest. After this went down, Harry went on to become an Auror.

Appearances

 * Harry Potter and the Deathly Hallows
 * Harry Potter and the Deathly Hallows: Part II (film)

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