Lily Potter sacrificed her life in order to protect her infant son,
Instead of dying, Lily's love for Harry created a counter 'curse' known as Sacrificial Protection and saved Harry. This type of love and sacrifice is a blood curse, and will forever protect the life of the individual whom has been 'cursed.
As every fan knows, Harry survived the killing curse as a baby because his mother's love protected him. However, after Voldemort returned using Harry's blood to regain his full body, he was allowed to touch Harry without suffering negative consequences.
The reason why the sacrificial protection charm is invoked only when Lily attempts to save Harry, and not when James puts himself between Voldemort and his family, is the specific circumstances of each situation. James is destined to die, as Voldemort never gives him an option to save himself.
What would happen if Voldemort didn't use Harry's blood? Without Harry's blood within Voldemort's own veins, the Sacrificial Protection that Dumbledore extended after the Potters' death, would've stopped at Harry turning 17. Moody revealed it slightly before the "7 Potters escape" kor whatever name it has).
Dumbledore knew it meant Harry would need to die in order for Voldemort to truly die, so he was pleased to know that Voldemort's mistake in taking Harry's blood might just save Harry's life. DUMBLEDORE: [Voldemort's] body keeps her sacrifice alive, and while that enchantment survives, so do you . . .
Voldemort can not comprehend love, and so it destroys him to touch Harry because Lily's love for her son runs through Harry's veins and body. ems Harry burnt Quirrell's face when he touched it.
What drove Lily Potter into the arms of James Potter and away from Severus Snape? She likely realized just what James had been willing to do for a friend. Harry Potter's father would have had to do something extreme to draw Lily's attention after the way James first chose to show his interest.
Lily admires the way younger students look up to him. She loves the way he looks at her, his stare alone telling her how much he cares, like she has been his world long before either of them knew it. She loves the way he was her world too, he had been for a long time, she just hadn't realized it.
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.
Spells Harry is immune to become new unforgivables. Harry is immune to Obliviate and Avada Kedavra due to them both being magics that target the soul? Obliviate causes the sould to be 'unaligned' with the mind and that's why things aren't remembered.
Voldemort wanted to humiliate Dumbledore, not kill him directly. Plus the story wouldn't allow it, the book would have been over so quickly. Voldemort was a dark lord that could have also been killed MANY times with the killing curse, but what story would there be if that happened?
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.
Its basically taboo. In the magical world, using one of the three unforgivable curses is the worst possible thing a person could do, and avada kedavra's the worst of them. Nobody half decent would use avada kedavra, and the people who were ready to use the spell were all on voldemort's side anyway.
Avada Kedavra, also known as the Killing Curse, kills a person instantaneously and without injury. There is few counter for it, and only one person, Harry Potter, has ever survived it with Sacrificial Protection that has been endowed upon Harry Potter by His Mother Love for Him.
As Rowling explained in a series of tweets, Snape loved Harry's mother, Lily, and his unrequited affection drove him to resent Harry's father, James — and by extension, Harry himself.
Now, as firmly established, Snape was not the greatest fan of Harry, but that didn't mean that he ever stopped loving Lily. Dumbledore was surprised that Snape seemed to care for the boy. With a swish of his wand, Snape conjured up a Patronus – Lily's Patronus, a doe. 'Always,' he said.
The fact that Lily chose James Potter, Harry's father, only fuels Snape's hostility towards Harry. Snape's character has been widely acclaimed by readers and critics. Rowling described him as "a gift of a character" whose story she had known since the first book.
The acclaimed author explained that Harry paid tribute to Snape because of “forgiveness and gratitude.” Though Snape bullied Harry, he also saved him. “Harry hoped in his heart that he too would be forgiven.
As Rowling sees it, Snape eventually sacrificed himself in order to save Harry at the Battle of Hogwarts, so Harry felt the need to honor him. There's a whole essay in why Harry gave his son Snape's name, but the decision goes to the heart of who Harry was, post-war.
Harry Potter, I now speak directly to you. On this night, you have allowed your friends to die for you rather than face me yourself. Lord Voldemort : There is no greater dishonor. Join me in the Forbidden Forest and confront your fate.
He is greatly depleted by the physical strain of fighting the far stronger, evil soul inside him. Quirrell's body manifests burns and blisters during his fight with Harry due to the protective power Harry's mother left in his skin when she died for him.
Voldemort hugged Draco as an improvisation and it wasn't planned. Even Tom Felton (Draco Malfoy) was caught unaware which increased the effect. In Harry Potter style, it was like a welcome for Draco, but as Voldemort had never known love, he didn't know how to hug him very well. Thats why they had the awkward hug.