Long story short, Voldemort trusted all his Death Eaters, no matter their blood status. If they could prove their loyalty, which Snape did, they were trusted.
Since Voldemort believed Snape's story, there was no punishment needed. Snape is claiming (falsely of course) that since Voldemort didn't explicitly reveal himself to Snape, he was unaware of who Quirrell really was, and therefore didn't know he was opposing Voldemort.
Voldemort thought Snape was the owner of the Elder Wand. Using Avada Kedavra while the Elder Wand was resisting Voldemort was already a risky business, but using it against the true owner would be suicide (as Voldemort would find out when he used the Elder Wand against its true owner: Harry).
Snape dies at the hands of Lord Voldemort in the seventh book, at which time his back story is revealed. Despite his attraction to the Dark Arts and Voldemort's ideology of wizard supremacy, Snape's love for Muggle-born Lily Evans, Harry's mother, eventually compelled him to defect from the Death Eaters.
It's because Snape did something far cleverer than merely “shielding his mind” from Lord Voldemort. As one can make out from their interactions, Snape seemed to be the only Death Eater whom Voldemort ever had any modicum of respect for.
Quirrell didn't use the Killing Curse on Harry, because Voldemort said “use the boy” to get the Sorcerer's stone from the Mirror of Erised. If Quirrell had killed Harry right away, he would have lost the chance to get the stone.
In order to conjure the avada kedavra curse, you have to want to kill your victim. We all know that Voldemort could easily kill a child without an ounce of remorse... but not Snape. Snape didn't want to kill Dumbledore, and this was why the spell was blue instead of the usual green.
In GoF, Sirius doesn't believe that Snape was a death eater. He says that he couldn't see Dumbledore allowing him to work at Hogwarts if he'd ever worked for Voldemort. But after Voldemort's resurrection, most people seem to know of Snape's status as a spy.
Voldemort intentionally made six Horcruxes, but when he used Avada Kedavra on Harry, he unintentionally created a seventh Horcrux. Instead of dying, Lily's love for Harry created a counter 'curse' known as Sacrificial Protection and saved Harry.
He doesn't trust Snape as Dumbledore does, but he believes that he can detect any disloyalty. Moreover, Voldemort regards Snape as highly intelligent and therefore ' as a true Slytherin ' a person whose top priority is to take care of himself.
He truly believed the Elder Wand had to be passed down through murder, because that is what the legends say. But even if he knew that one only had to be disarmed, Voldemort was still too arrogant to do that. He kills anyone in his way.
In 1997, Voldemort became in charge of the British Ministry of Magic and ensured that no one could speak his name. If a character said the name, they would be considered rule breakers who needed to be punished, and Voldemort ensured that his Death Eaters would find that person quickly.
Yes, they did, as they both believed that Snape was a traitor and a murderer of their beloved friend and headmaster, Albus Dumbledore. Flitwick was angry and wanted to protect the students, but for McGonagall, it was more about revenge because Snape had killed her closest friend. They did want to kill him.
However, Draco was ordered by Voldemort to kill Dumbledore. Lestrange saw this as an opportunity to test Snape's loyalty and while making this vow to always watch over Draco, Lestrange forced Snape to agree to killing Dumbledore himself in case the youngster was unable to do so.
Snape told him to. It was necessary for Harry to take his tears so that he would know what he needed to do to defeat voldemort. Especially since the only other person that could tell him was Dumbledore and he was dead.
Draco Malfoy's mother Narcissa was cold, cunning and devoted to the Dark Lord. But she was also a mother, which meant she was willing to risk everything to make sure her son was safe. When Harry survived Voldemort's Killing Curse for the second time, Narcissa pretended he was dead so she could get to Draco.
Though Harry encountered many opportunities that deemed Avada Kedavra necessary, it remains as one of the Unforgivable Curses Harry Potter never cast. For one, he viewed the spell as an immoral practice commonly used by users of the Dark Arts.
Her sacrifice gave Harry the power of love, a protection spell sealed with the blood spilled by her death.
Harry Potter: Stag
Harry's patronus is undoubtedly the most recognizable. The stag is first seen in Harry Potter and the Prisoner of Azkaban when it saves Harry and Sirius Black (Gary Oldman) from the dementors at the lake.
First, he needed to clear Hagrid's name when he turned out to be innocent of opening the Chamber of Secrets. Dumbledore wanted people (mainly the parents of students) to trust Hagrid again. The second reason is that Hagrid does possess the required knowledge. I still would have hired Grubbly-Plank, though.
The answer is that Sirius wanted to deflect attention from the real Secret-Keeper. He probably hoped Voldemort would go after him so he could steer attention away from Pettigrew.
Severus Snape is one of the most divisive characters in the entire "Harry Potter" series. He was a double agent, so many character details were kept a secret. His mother was a witch and his father was a Muggle, leading to the moniker "The Half-Blood Prince."
Sectumsempra is a curse invented by Professor Severus Snape, during his childhood, when he was known as "The Half-Blood Prince". He created it with the intention of using it against his enemies, and it soon became one of his specialties.
He said, "According to Victorian flower language, asphodel is a type of lily meaning 'my regrets follow you to the grave' and wormwood means 'absence' and also typically symbolizes bitter sorrow." If you combined that, Snape's words mean "I bitterly regret Lily's death."