However in the following fight against his cousin Bellatrix, he underestimated his opponent and even openly mocked her, before being hit by an unknown spell that blew Sirius backwards and he disappeared through the veil in the Death Chamber.
In the book, the curse that hits Sirius is not identified (although it is rumoured to be Stupefy because of the red light), and him being knocked through the Veil is what causes his death.
Sirius is hit by Bellatrix's curse, and his stunned body arcs into the air and floats through the archway, disappearing behind the veil. Harry expects Sirius to reappear on the other side, but he never does.
Bellatrix only cast the Killing Curse on Sirius in the movie, but in the book she cast an unknown spell that pushed him into the Veil, so Sirius did not canonically die by the Killing Curse. As for what happened in Fantastic Beasts 3, that was an error. The Qilin should have died after one Killing Curse.
Eventually, his death was avenged by Molly Weasley. He briefly appeared again to Harry through the Resurrection Stone on 2 May 1998, along with James and Lily Potter, and Remus Lupin. Harry later named his first son James Sirius Potter after him and his father James Potter I.
Why Dumbledore WANTED Sirius to ROT in Azkaban - Harry Potter Theory
Why did Cedric Diggory become a death eater?
Due to his humiliation in the Triwizard Tournament, Cedric eventually becomes a Death Eater and kills Neville Longbottom. Due to Neville's death, the final Horcrux Nagini was never destroyed, and as a result Voldemort is never defeated, kills Harry and takes over the Wizarding World.
His help at the Ministry of Magic might result in a smoother mission. Thanks for A2A. No. Sirius had no idea that Harry was a Horcrux, and I think that is one of the kindest things that was done.
The Order battles the Death Eaters in the "Death Chamber". During a frenzied duel with Bellatrix, Sirius taunts her for failing to harm him. Bellatrix strikes Sirius with a curse, sending him backwards into the veil and to his death.
During the final battle, Bellatrix was the last Death Eater standing. She was eventually killed in a duel by Molly Weasley after her attempted murder of Ginny Weasley. Before her death, Bellatrix secretly gave birth to an illegitimate daughter named Delphini, whom she conceived with her beloved master, Lord Voldemort.
Peter spent twelve years living in his Animagus form as the Weasley family's pet rat, Scabbers. However, his identity was exposed by Sirius and Remus in 1994, and Pettigrew, with nowhere else to go, sought protection in returning to the service of Lord Voldemort, whom he found in the forests of Albania.
Remus fought at the Battle of Hogwarts on 2 May 1998, during which his wife was murdered by Bellatrix Lestrange. Remus was also murdered by Death Eater Antonin Dolohov, during the first half of the same battle. His death was possibly avenged by Filius Flitwick.
Sirius's intense love for James, his grief after James's death, and his anger towards Peter drove him to insanity, getting him locked up in Azkaban for crimes he never committed.
Peter Pettigrew, one of James and Sirius's best friends, was the real traitor. The Potters, Sirius, and Peter were the only ones who knew that they had switched the Potters' secret keeper from Sirius to Peter at the last moment.
So, Sirius's death influences the plot in many ways. There would have been ways to rewrite the story so that the end result was the same, but it would be a very different path to get there. Well, if Sirius was still alive and if (which is a big if) he was in on the Horcrux secret, he could have told Harry who R.A.B.
After Voldemort's defeat by Harry at the Battle of Hogwarts and the restoration of the Ministry of Magic by the new Minister, Kingsley Shacklebolt, Umbridge was sentenced to life imprisonment in Azkaban for her crimes against Muggle-borns.
Despite Harry Potter using Unforgivable Curses, he never cast the worst of them all — the Killing Curse, Avada Kedavra. Avada Kedavra was Lord Voldemort's signature spell. In fact, the Dark Lord directly killed multiple notable figures, including Harry's parents, Lily and James Potter, with the Killing Curse.
Losing Sirius was far, far more devastating for Harry than watching Dumbledore be blasted from the tower. Sirius was the final remnant of Harry's family. He could tie him to his parents, but was full of life in a way that Remus never was. Sirius was more than a friend, or a mentor - he was a father, and brother.
He'd loved her, he really had. He'd also loved Sirius. He hadn't known that Sirius was in love with him too, not until his wedding day. As much as everything in James had ached to say 'I love you too, let's leave together', he hadn't been able to do that to Lily.
Ironically, if he had used it rather than Dolores Umbridge's fire to contact his godfather, Kreacher would not have been able to lie to Harry about where Sirius was, and thus Harry would never have gone to the Department of Mysteries and Sirius would not have died.
Draco, who implies that he is aware of how Sirius Black was supposedly involved in the deaths of Harry's parents, also taunts Harry about the impending threat of Black: "If it was me, I'd want revenge. I'd hunt him down myself."
Family. Snape's family background is mostly shown in flashbacks during the course of the last three novels. Snape was born to Eileen Prince, a witch, and Tobias Snape, a Muggle, making him a half-blood (hence the name, "Half-Blood Prince").
