Fantasy Literature

In The Lord of the Rings backstory, Sméagol (who becomes Gollum) murders his cousin Déagol after Déagol finds the One Ring in the Anduin River. This killing is the central origin story of how Sméagol becomes Gollum and is corrupted by the ring.

Tom Riddle Sr. (Voldemort's Muggle father) lived in the village of Little Hangleton. This is confirmed in Goblet of Fire and Half-Blood Prince, where the Riddle House is located. The Gaunt family (Voldemort's maternal line) lived nearby, but his father's residence was Little Hangleton.

Voldemort murdered Hepzibah Smith to steal both Slytherin's locket and Hufflepuff's golden cup. Hepzibah was a wealthy witch who had inherited these heirlooms from the Founders.

Regulus Black discovered Voldemort's horcrux secret when he was taken to the cave and sacrificed himself to steal the locket. Albus Dumbledore independently deduced Voldemort's use of horcruxes through extensive research and investigation.

Barty Crouch Jr. helped Voldemort by managing his return at Hogwarts, Nagini was used in the ritual, Bertha Jorkins' information revealed the plan, and Peter Pettigrew conducted the ceremony that restored Voldemort's body. All four played essential roles in Goblet of Fire.

The prophecy orbs in the Department of Mysteries are enchanted so that only those mentioned in the prophecy can touch them safely. Anyone else who attempts to handle one will suffer madness, as happened to Sturgis Podmore.

Voldemort made seven horcruxes: the diary, Marvolo Gaunt's ring, Slytherin's locket, Hufflepuff's cup, Ravenclaw's diadem, Nagini the snake, and Harry Potter (unintentional). The Basilisk was not a horcrux, and Gryffindor's sword was used to destroy horcruxes.

Snape killed Dumbledore on Dumbledore's own orders as part of a complex plan to protect Draco Malfoy and gain Voldemort's trust. Neither Malfoy, Voldemort, nor Bellatrix ordered the killing - it was Dumbledore's request.

This statement appears in Harry Potter and the Order of the Phoenix. While Voldemort has extensive dark magical knowledge, the statement contextually refers to Dumbledore's superior overall magical wisdom and experience across all branches of magic. However, if taken literally about dark magic specifically, Voldemort could be argued as more knowledgeable.

This is a duplicate of question 56163 with uppercase names. The same analysis applies - the statement contextually appears about Dumbledore's comprehensive magical knowledge, though Voldemort has superior dark magical knowledge.

Albus Dumbledore was the one who informed Tom Riddle that he was a wizard and recruited him to attend Hogwarts. This happened when Dumbledore visited the orphanage where young Tom Riddle lived. The other characters (Snape, Umbridge, McGonagall) did not have this pivotal role in Riddle's story.

After Regulus Black stole the locket from the cave, he gave it to his house-elf Kreacher. Kreacher kept it for many years until Mundungus Fletcher stole it, and it eventually ended up with Dolores Umbridge.

Voldemort did not appear in the third book, Harry Potter and the Prisoner of Azkaban. He was mentioned and his presence was felt through his followers, but he did not make a physical appearance. In all other books (Philosopher's Stone, Goblet of Fire, Order of Phoenix, etc.), Voldemort appears in person or in corporeal form.

Severus Snape invented the curse Sectumsempra, which causes slashing wounds that cannot be healed by normal means. He created it during his time as a student at Hogwarts. The other curses listed are the Unforgivable Curses: Avada Kedavra (killing curse), Cruciatus Curse (torture), and Imperio (mind control).