Summary. Snape's death by Nagini highlighted his loyalty to Dumbledore and Harry, showing his true allegiance in the end. Voldemort used Nagini to kill Snape instead of Avada Kedavra, possibly signaling a hidden respect or hope for Snape.
As suggested by Screen Rant, Voldemort used Nagini to kill Snape because of the Dark Lord's subconscious desire to keep his 'devoted follower' alive. The killing curse rarely backfires, meaning that if Voldemort had used Avada Kedavra against Snape, then the Potions Professor's death would be guaranteed.
Assuming it is the case, evil nature of Nagini's snake half who later joined Voldemort is easily attributed to the loss of humanity which ended up in her human half reminiscent to Urizen who bereft of his true self Vergil's humanity which ended up in his other half V.
This event took place in the Shrieking Shack during the Battle of Hogwarts on 2 May 1998. During this event, Lord Voldemort murdered Severus Snape with Nagini, as he incorrectly believed Snape was the master of the Elder Wand.
nagini was owned by voldemort, and also she possessed voldemort's soul and also voldemort could possess his body (like he did when he attacked arthur weasley) so in a way, it was still voldemort killing harry.
Nagini Scene - Fantastic Beasts and Crimes of Grindelwald(2018) || Movie Scene HD
Did Harry tell Neville to kill Nagini?
Harry avoids encountering any of his other friends, but goes up to Neville and gives him the information that the snake Nagini must be destroyed, in case anything happens to Ron and Hermione.
At this point, McGonagall begins to gain the upper hand as it becomes clear he cannot further transfigure or counter her attack, so the only way he avoids it is by taking refuge behind a suit of armour that he forces in front of him.
Malfoy spots Harry and casts a Cruciatus curse; Harry, defending himself, using the Half-Blood Prince's Sectumsempra spell without knowing its effects. To his horror, it gashes Draco's face and chest, spilling his blood everywhere. Moaning Myrtle flies off, screaming.
The intent of the caster is a vital component of the spell. While Snape was still able to produce Avada Kedavra without any intent to kill, being a great wizard, the mix of hesitation and necessity probably resulted in the spell being blue.
Why did Harry's scar hurt when Snape looked at him?
J. K. Rowling stated that the pain from Harry's scar on his forehead was caused by the piece of Voldemort's soul trying to leave his body through the wound it entered to rejoin its master's soul.
Delphini was born in secret at Malfoy Manor in early March 1998 as the result of a liaison between Bellatrix Lestrange and Lord Voldemort. On 2 May 1998, both of her biological parents were killed in the Battle of Hogwarts.
Behind the scenes. When Harry and Hermione are on the first floor of Bathilda's house, Nagini (inside the corpse of Bathilda) tells Harry to 'Come! ' from the next room in Parseltongue. In reaction, Hermione jumps and clutches Harry's arm, and the two of them obey the command.
Notably, Voldemort appeared to be entirely unaware of this split, as he later created a seventh Horcrux in his quest to have six, and continued to target Harry Potter despite him now holding part of Voldemort's own soul.
Summary. As a character, Severus Snape was often misunderstood. Many believed he was a villain, and weren't convinced he was actually working for Dumbledore. Snape killed Dumbledore in an effort to protect Draco Malfo and spare him from the emotional trauma of murder.
According to the films, Hedwig's killer might have been Selwyn, who was known to be pursuing Harry and Hagrid at the time since Hedwig's death in the film happened quite a while into the fight when there was only a couple death eaters following them, or it might have been Stanley Shunpike under the Imperius Curse.
The reason Voldemort targeted Harry and killed his parents was due to a prophecy that predicted his downfall. The prophecy mentioned that the person who could vanquish Voldemort would be born in July to parents who had defied him three times and would have powers that Voldemort could not understand.
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").
In the film, Bellatrix casts a blue spell at Ginny Weasley instead of a Killing Curse, who deflects it using a Shield Charm. In the book she just avoids it.
The injury was caused by Snape's Sectumsempra spell in order to stop the Death Eaters from hurting George (who he thought was Harry) and Lupin, but missed and hit George. Hermione and Kingsley then arrived, both unharmed, followed by Arthur and Fred Weasley, both concerned for George.
Vulnera Sanentur was the song-like incantation of a healing spell which was used to heal deep wounds, which could also be used as the counter-curse for the curse Sectumsempra.
Why didn't Harry get in trouble for using sectumsempra?
When Harry critically injured Draco Malfoy with the Sectumsempra curse, it was actually enough to have him expelled, as Professor Minerva McGonagall stated Harry was lucky not to have been, due to Snape giving lenience to prevent others from finding out that he was the one who invented the curse.
Thus, the answer is simple - Snape mistreated Neville as he was nearly the chosen one. Had Voldemort picked Neville instead of Harry, Lily's life would have been spared. Snape relieved his dark past through Neville Longbottom and therefore resorted to mistreating and insulting the almost-chosen one of Harry Potter.
When it comes to the area of Transfiguration, McGonagall definitely has the upper hand. But when it comes to inventing spells, the Dark Arts, Legilimency and Occlumency, Snape has the edge. McGonagall is surprisingly skilled in the Dark Arts but not on the same level as Snape.
