Arc 38The Obscurus and Slughorn
William and Hermione uncovered the Scourers’ plan to destroy New York with an Obscurus, rescued the abducted children, and stopped Graves by redirecting the blast. Back in Britain, William recruited Slughorn for Hogwarts and returned to a Diagon Alley threatened by Death Eaters and mysterious kidnappings.
- William and Hermione investigated Tom’s Scourer gathering in New York, where Tom preached wizard supremacy and arranged for William to arrest him to advance his standing.
- William learned that the Scourers were abducting magical children to create an Obscurial and enlisted Newt, Tina, and Hermione to trace the missing children and their captor.
- William and Hermione found the children, including Lucas Picquery, in Graves’s hidden chamber and rescued them while Graves took Mera to the Congress execution chamber.
- William stopped Graves from sacrificing Mera, but Graves revealed that an Obscurus inside him would destroy New York, so William transferred the Obscurus through Vanishing Cabinets and escaped with Mera.
- William received public honors for saving New York, learned Newt’s method for handling an Obscurus, and returned to Britain with Hermione.
- Dumbledore asked William and Hermione to recruit Horace Slughorn, and William brought Harry along to approach him at his home.
- William persuaded Slughorn to return to Hogwarts as Potions Professor, then told the Weasleys that Slughorn would take the post and explained how Arthur’s promotion could help regulate counterfeit protective products.
- William investigated the Death Eaters’ rampage in Diagon Alley, where Ollivander and Florean Fortescue had vanished, and told Fred and George to delay buying more shops.