According to Albus Dumbledore, after the second refusal, no Defence Against the Dark Arts teacher held the post for more than one school year. Dumbledore believed that this was due to Voldemort placing a jinx on the position, a belief that was popularly spread throughout the school.
As explained by Dumbledore in Harry Potter and the Half-Blood Prince, Voldemort cursed the position after that, resulting in the school being unable to "keep a Defense Against the Dark Arts teacher for longer than a year." This curse meant that Hogwarts had seven different D.A.D.A.
Why didn t Dumbledore teach Defence Against the Dark Arts?
Dumbledore had three very demanding jobs: he was the Headmaster of Hogwarts, Chief Judge of the Magical British court, and Head of the International Confederation of Wizards. Not to mention he was busy tracking Voldemort through Europe, so he simply didn't have time to teach on the side.
Why did Voldemort want to become the Defense Against the Dark Arts teacher?
Although Voldemort was merely using the application as an excuse to return to Hogwarts to do research into dark magic, recruit more followers, and hide his diadem Horcrux, he was still infuriated that his return to the school had been denied despite also knowing that Dumbledore would never hire him.
Snape becomes the DADA Professor and technically leaves the position after the school year and becomes the headmaster. And of course Amycus Carrow becomes the DADA Professor but is struck down by Snape who's defending the school and has wand taken by Snape.
Why There Was a Different Defense Against the Dark Arts Professor Every Year: Harry Potter Explained
Is Dolores Umbridge a death eater?
Harry describes Umbridge to Sirius Black, saying that she's vile enough to be a Death Eater, despite not being one. Umbridge is also depicted to be a prejudiced person, despising half-breeds and Muggle-born witches and wizards to the point of firing Hagrid due to his half-giant birth status.
He was most likely more eligible for the job than some of the other teachers that Dumbledore hired *cough* Lockhart *cough*. However, Dumbledore knew that he would only get one year with Snape as DADA professor, so he kept it for later. Also, he purposefully kept Snape in the potions master role.
What did Dumbledore believe was the sixth horcrux?
Dumbledore wonders if one of the remaining two Horcruxes belonged to Ravenclaw, since Gryffindor's only known relic, the sword, is safe in Dumbledore's office. Dumbledore believes that Nagini, the snake, is the sixth.
Tom Riddle, better known as Voldemort, cursed the position to prevent any professor from teaching the class for more than a year. While it is not referenced in the movies how the Defense Against the Dark Arts position was cursed, Dumbledore hints at the curse in the novel Harry Potter and the Half-Blood Prince.
Who is the best Defence Against Dark Arts teacher in Harry Potter?
Lupin was the best Defense Against the Dark Arts teacher, as he actually taught the students. Quirrell didn't want the students knowing too much as it would impede the return of Voldemort.
A teacher who taught the skill did not need to be an Animagus themselves, as shown when Professor Dumbledore, who was not an Animagus, taught Minerva McGonagall how to successfully become one.
Snape wanted the Defense Against the Dark Arts job simply because he excelled at it. He was the good side's best candidate to prepare Hogwarts students for the real world and the future predicament.
Albus Dumbledore, for example, died when he was 115 years old, which was relatively young for a wizard. Nicholas Flamel and his wife lived more than 600 years thanks to the Philosopher's Stone, but regular wizards can live between 150 and 200 years. The Trolley Lady, for example, is around 190 years old.
This jinx was cast by Tom Marvolo Riddle, who was by the time known exclusively as Lord Voldemort, to curse the Hogwarts school's Defense Against the Dark Arts class to ensure that none of its applicants could hold their post for more than one year.
Ironically, Lockhart lost all of his memory on 29 May 1993 due to a backfired Memory Charm cast by Ron Weasley's damaged wand. Lockhart then became a permanent resident of St Mungo's Hospital for Magical Maladies and Injuries.
In Harry Potter and the Cursed Child, it is revealed that Bellatrix gave birth to Voldemort's daughter Delphi in Malfoy Manor before the Battle of Hogwarts.
The initial trauma from his childhood led to the false identity he developed in his teenage years when he decided to rewrite his story and identity. He wanted to rid the world of those who had hurt him, and he'd almost succeeded before the prophecy of Harry's birth stopped and eventually destroyed him.
Severus Snape eventually joined the ranks of Lord Voldemort's Death Eaters. His actions as a Death Eater are largely unknown, though he quickly became an important Death Eater in Voldemort's inner circle. He was the spy responsible for informing Voldemort about the prophecy foretelling his downfall.
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.
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.
Dumbledore knew about Horcruxes. He knew how they were formed, what happened after that, etc. He probably got to know Harry was a Horcrux when he saw the Scar on Harry's forehead, but maybe he wasn't sure.
Dumbledore's lack of belief that Sirius is innocent is also suspect. Sirius was a member of the Order of the Phoenix which fought against Death Eaters, but Sirius also was as close to James as a brother, the Potters even took him in when he ran away from home.
Later however, Dumbledore confirmed that he allowed Draco to remain at Hogwarts to keep him safe from Lord Voldemort's wrath, despite knowing he nearly killed both Katie and Ron Weasley.
Why did Snape cast Expecto Patronum when talking to Dumbledore?
Therefore, when Snape cast his Patronus after Dumbledore questioned why he cared that Harry would have to sacrifice his life to stop Voldemort, it was a definitive way of proving that he was entirely on the side of good.
