Arc 7The Animagus Ritual
Will secretly helped Voldemort exploit Harry’s supposed death while studying soul Transfiguration and completing a powerful Animagus transformation. After learning Harry could soon recover, Will sabotaged the Mandrakes and escaped the Greenhouse with Peter when Moody interrupted them.
- Draco told Dumbledore that Will had controlled the Basilisk and attacked Harry, but Dumbledore revealed that Harry was alive and recruited Draco to his side.
- Dumbledore trained Harry in secret while Will studied soul Transfiguration and learned how dangerous it was to alter the soul, body, and magic together.
- Will began the Animagus Ritual with a Mandrake leaf, gained Formless Chaos, and transformed into multiple animal forms, including a phoenix-like Fantastic Beast.
- Will completed the Ritual during a storm, discovered that he could cast spells in animal forms, and showed Professor McGonagall his Silver-and-Black Falcon form.
- Will persuaded Professor McGonagall to give him a Time-Turner application, then used Veritaserum to learn from Peter that Harry was alive and could be revived with Mandrake potion.
- Will ordered Peter to search for Harry and secretly planned to destroy the Mandrakes, while rumors of the sabotage spread through Hogwarts.
- Will and Peter entered the Greenhouse to destroy the Mandrakes, but Moody interrupted them, so Peter hid as a rat and Will transformed into a Venomous Snake.
- Will and Peter escaped through a Secret Passage after Moody left, while Harry remained petrified and Mr. Strange expected the Mandrakes to mature soon.