Recaps

William defeated Voldemort’s forces at his home, then pursued the Philosopher’s Stone as Harry uncovered Snape and Lily’s childhood friendship. The story left William preparing for a final war and building influence while Harry learned that he still had a role in finding Voldemort’s remaining Horcruxes.

• Slughorn identified Eileen Prince as Snape’s mother and told Harry that Snape and Lily had been close friends, while Harry discovered Snape was the Half-Blood Prince and began to sympathize with him over Ginny.
• Ron was poisoned at Slughorn’s party, and William, Slughorn, and Snape saved him as Snape warned Dumbledore that Harry might ask Petunia about his past with Lily.
• Voldemort ordered Death Eaters to capture Xenophilius and kill Luna, while William celebrated Christmas with his household and caught Anne, Luna, and others stealing his koi.
• William’s traps incapacitated the Death Eaters who raided Lovegood’s house, and Voldemort arrived at William’s property before William stopped his attack and fought him amid the Aurors’ arrival.
• William attacked the hidden Runespoor and broke Voldemort’s wand, but Voldemort escaped after the snake survived as a Horcrux, and William agreed to let Kingsley take the dead Death Eaters while keeping the living captives.
• William and Nicolas Flamel made a Philosopher’s Stone, with Nicolas revealing that Lily Evans had been his former apprentice and had learned the protective magic that saved Harry.
• Harry went to Spinner’s End to confront Snape and secretly watched a Pensieve memory of Snape meeting Lily as a boy, while William’s search for Harry led him to suspect Harry had gone there to learn about his mother.
• Dumbledore offered William a Wizengamot seat and command of the European allied force, then told Harry that William had destroyed the Horcruxes shown in the memories and that Harry must help uncover the rest.
• William considered using the coming allied forces to build a Greater Europe Alliance and investigated counterfeit potions, while Harry, Ron, and Cho prepared for Ravenclaw’s match against Gryffindor.

William helped Harry secure Slughorn’s memory, then followed Tom’s schemes from the Capitol to Ilvermorny and obtained Slytherin’s Wand. After William killed Tom and saved Ilvermorny from the volcano, he found the Prehistoric Mysteries at the Washington Monument, while Tom survived and learned that Salazar Slytherin had written the prophecy.

• William set up Slughorn’s staged encounter with Tom, secured Slughorn’s memory about Horcruxes, and learned from it that Tom had asked about making seven.
• William and Hermione went to Ilvermorny, where they learned Tom was using the Scourers to create chaos and planned to take the Snakewood.
• William, Hermione, and Trene investigated the Capitol and used Babbling’s amulet to confirm the Prehistoric Mysteries were not there before the Scourers’ bombs destroyed the building.
• Tom arranged an assault on Ilvermorny with Uagadou Animagi, while Babbling planned to take Slytherin’s Wand before handing it over to him.
• William, Hermione, Trene, and Babbling subdued the Pukwudgie and took Slytherin’s Wand, but its removal triggered the volcano beneath Ilvermorny.
• Tom severed his Horcrux connections with the wand, but William revealed his deception, killed him, and flew back to Ilvermorny with the wand and Resurrection Stone.
• William used stored time magic to restore the Snakewood and help save Ilvermorny, then found the Prehistoric Mysteries’ power at the Washington Monument and decided it was a deception.
• Tom awoke wounded in the Capitol Library, where an old man identified himself as Salazar Slytherin and explained that the prophecy referred to the Washington Monument.

William helped defeat Voldemort’s summer offensive, while Tom abducted Harry to use him in a search for Death. William and Hermione traveled to Egypt to find the entrance to the Land of Death, reaching the sealed sanctuary at Karnak Temple.

• Tom learned that a fragment of his soul was attached to Harry and agreed to seek the third Hallow for Slytherin in exchange for the obelisk’s power and guidance.
• William defeated Tom’s plan at the obelisk, prepared to destroy the remaining Horcruxes, and led Ravenclaw to its fourth consecutive Quidditch championship.
• William and the allied forces ambushed Voldemort’s army, battled across Helvellyn and the Hebrides, and captured Wyvern Tower after Dumbledore and Hermione brought reinforcements.
• William visited Godric’s Hollow with Dumbledore as Harry prepared to face his foretold death, while Gregorovitch began making an imitation Elder Wand for him.
• Tom tricked Harry into using a switched Portkey and took him, prompting William and Dumbledore to plan a rescue through the golden coffins and the Land of Death.
• William and Hermione traveled to Egypt and joined Bill and the Gringotts curse-breakers, while William investigated the apartment collapse and heard Jorah blame Arya Grindelwald.
• Jorah showed William and Hermione the phantom image of Karnak Temple and explained that the Four Founders had studied there and that their four coffins remained inside.
• William led the curse-breaking team into Karnak Temple, where a Goblin directed them toward the sanctuary that the Goblins had never opened.

William and Hermione crossed the Underworld, uncovered Vivian’s identity, and rescued Harry from Tom as Voldemort prepared to attack. The arc ended with Voldemort’s forces surrounding Hogwarts and William evacuating the students before the battle began.

• William and Hermione entered the temple, escaped its resurrecting mummies, and met Vivian, who asked William to kill Arya in exchange for the Book of Two Ways.
• William refused to kill Arya, exposed Vivian as an unreliable guide, and carried her with Hermione into the Underworld to question her.
• Vivian revealed that Morgan had impersonated her and that they were both daughters of Death, while William and Hermione learned that a mysterious old man might be Death himself.
• Tom completed Death’s trial with Harry, received the Ark of the Covenant, and tried to drown Harry before William, Hermione, and Vivian arrived to fight him.
• William, Hermione, and Harry escaped the Underworld and returned to the magical world, where Harry learned he was a Horcrux and said goodbye to Dumbledore and Snape.
• William recruited Draco and helped plan against Voldemort, while Voldemort arranged to attack Hogwarts and the Ministry with Grindelwald and the Death Eaters.
• William warned Dumbledore of Voldemort’s plan, and Dumbledore arranged for Hermione and Phoebe to target the Gringotts Horcrux while Snape, Sirius, and Lupin pursued Wormtail.
• Voldemort’s army surrounded Hogwarts, but William refused to join him and sent the students away through Portkeys as the attack began.