Recaps

Harry and Neville survived a brutal boat contest, then Amosta’s immense Patronus drove off the Dementors and left him holding one captive. As Harry learned of Sirius Black’s betrayal and confronted his own desire for revenge, Amosta forced him to face what killing Black would mean.

• Harry and Neville escaped the boat race’s traps, fought a dark-magic-corrupted Sinkpunk, and were rescued after both fell unconscious.
• Amosta summoned a gigantic Tengshe Patronus to repel the Dementors during the Quidditch match, then trapped them in a black glass bottle.
• Dumbledore told Amosta that Harry might be a Horcrux and revealed that he planned to leave Hogwarts to seek another possible one.
• Amosta restored the shape of Harry’s broken Nimbus 2000 but warned that it remained unsafe, then arranged for Lupin to teach Harry the Patronus Charm.
• Amosta negotiated with Fudge to limit the Dementors near Hogwarts, while Harry overheard that Black had betrayed his parents.
• Harry confronted Amosta about keeping Black’s betrayal from him and admitted that he wanted to kill Black.
• Amosta conjured an image of Black offering Harry a dagger, and Harry recoiled before Amosta challenged his courage.

Amosta tracked down Sirius Black, learned that Peter Pettigrew had betrayed the Potters, and brought Sirius back to Hogwarts disguised as a cat while they sought proof. As Christmas arrived, Harry received a mysterious Firebolt, and Lupin reacted strangely to Filch’s search for the Marauder’s Map.

• Amosta discovered that Sirius was hiding in the Shrieking Shack, but Sirius escaped and Apparated to the Black family residence before Amosta caught him there.
• Sirius told Amosta that Peter Pettigrew had betrayed James and Lily, and Amosta agreed to help find Peter while refusing to let Sirius search Hogwarts alone.
• Amosta took the rights to use the Black family home as collateral, disguised Sirius as a black cat named Lenny, and brought him back to Hogwarts.
• Amosta let Remus meet Lenny, then revealed that Harry had grown up in a cupboard under the stairs, leaving Sirius devastated.
• Amosta asked Filch to find the Marauder’s Map, and Fred and George warned Harry that he was searching for it.
• Harry received a Firebolt for Christmas, and Hermione warned him that it might be dangerous or connected to Sirius.
• Harry, Ron, and Hermione visited Lupin with the Firebolt and Mrs. Weasley’s sweater, and Lupin advised Harry not to ride the broom until its origin was confirmed.
• Filch told Lupin that he had searched for the blank parchment Amosta requested, and Lupin trembled as he questioned him about it.

Remus learned Sirius’s story and reunited with him, while Amosta helped Sirius recover Regulus’s body and the locket from Voldemort’s cavern. Back at Hogwarts, Amosta learned that Lucius had come seeking Golden Viper’s help against Greyback’s pack.

• Remus heard Sirius’s account, accepted that it might be true, and wrote to Amosta for confirmation while keeping the matter from Dumbledore.
• Peter escaped the Owlery after Draco, Crabbe, and Goyle found him, then used Soul Departure to leave the boys as soulless puppets.
• Amosta met Remus and Sirius at Grimmauld Place, where Kreacher revealed that Regulus had hidden Voldemort’s locket and died retrieving it.
• Amosta, Sirius, Remus, and Kreacher entered Voldemort’s cavern, fought the Inferi, recovered Regulus’s body, and took the locket as Amosta broke through the cavern’s defenses.
• Sirius planned to clear his name and honor Regulus, while Amosta kept the locket and decided to ask Professor Babbling to decipher its runes.
• Sirius told Amosta that a pillar in ruins near Azkaban had made the Dementors keep their distance, and offered to guide him there.
• Lucius visited Amosta’s office and offered rubies for a commission, explaining that Greyback wanted help finding Golden Viper after threatening Draco.
• Amosta challenged Lucius over his reluctance to use the Malfoy family’s influence against Greyback, while Lenny realized that Amosta was Golden Viper.

Amosta's surveillance uncovered the link between Scabbers, Malfoy, and Greyback, while Harry and his friends learned that Sirius was innocent and Peter had betrayed Harry’s parents. The werewolves ambushed them in the Forbidden Forest, and Sirius flew the wounded group toward Hogwarts before collapsing as the blood moon vanished.

• Amosta followed Scabbers from Hogwarts to Greyback’s werewolf camp, then let him return while prioritizing the search for Peter.
• Harry won the Quidditch match against Ravenclaw, and he, Ron, and Hermione pursued Scabbers after spotting him in the Gryffindor common room.
• Harry realized the black dog was Sirius, and Hagrid took Harry, Hermione, and Ron into the Forbidden Forest to look for Malfoy.
• Harry attacked Sirius, but Remus revealed that Peter Pettigrew had betrayed Harry’s parents and that Scabbers was Peter.
• Greyback and his pack surrounded the group, and Sirius saved Harry before a green killing curse fell over Sirius, only for a stone wall to block it.
• Snape, Remus, Sirius, Hagrid, and the others fought the werewolves until Firenze, Ronan, and Bane arrived with the Centaurs.
• Hagrid wounded Greyback, and Sirius carried Harry, Hermione, Ron, and Malfoy toward Hogwarts as the werewolves and Centaurs clashed.
• A werewolf attacked the motorcycle, Harry severed its arm with mirror fragments, and Sirius slumped forward as the motorcycle plunged out of control and the blood moon vanished.