“But I don’t think I’ve ever known such a natural at Potions!” said Slughorn. “Instinctive, you know — like his mother! I’ve only ever taught a few with this kind of ability, I can tell you that, Sybill — why even Severus —”And to Harry’s horror, Slughorn threw out an arm and seemed to scoop Snape out of thin air toward them.”

“Merlin’s beard, Harry, you made me jump,” said Slughorn, stopping dead in his tracks and looking wary. “How did you get out of the castle?”“I think Filch must’ve forgotten to lock the doors,” said Harry cheerfully, and was delighted to see Slughorn scowl.”

“You are the Chosen One?”“Of course I am,” said Harry calmly.“But then . . . my dear boy . . . you’re asking a great deal . . .you’re asking me, in fact, to aid you in your attempt to destroy —”“You don’t want to get rid of the wizard who killed Lily Evans?”“Harry, Harry, of course I do, but —”“You’re scared he’ll find out you helped me?”Slughorn said nothing; he looked terrified.“Be brave like my mother, Professor. . . .”

“You’ll soon find out some wizarding families are much better than others, Potter. You don’t want to go making friends with the wrong sort. I can help you there.”He held out his hand to shake Harry’s, but Harry didn’t take it. “I think I can tell who the wrong sort are for myself, thanks,” he said coolly.”

“But somebody else had spoken Snape’s name, quite softly.“Severus . . .”The sound frightened Harry beyond anything he had experienced all evening. For the first time, Dumbledore was pleading.Snape gazed for a moment at Dumbledore, and there was revulsion and hatred etched in the harsh lines of his face.“Severus . . . please . . .”Snape raised his wand and pointed it directly at Dumbledore. “Avada Kedavra!”A jet of green light shot from the end of Snape’s wand and hit Dumbledore squarely in the chest. Harry’s scream of horror never left him; silent and unmoving, he was forced to watch as Dumbledore was blasted into the air. For a split second, he seemed to hang suspended beneath the shining skull, and then he fell slowly backward, like a great rag doll, over the battlements and out of sight.”

“This is your copy of Advanced Potion-Making, is it, Potter?”“Yes,” said Harry, still breathing hard.“You’re quite sure of that, are you, Potter?”“Yes,” said Harry, with a touch more defiance.“This is the copy of Advanced Potion-Making that you purchased from Flourish and Blotts?”“Yes,” said Harry firmly.“Then why,” asked Snape, “does it have the name ‘Roonil Wazlib’ written inside the front cover?”Harry’s heart missed a beat. “That’s my nickname,” he said.”

“I never meant to call you Mudblood, it just-" Lily: "Slipped out? It’s too late. I’ve made excuses for you for years. None of my friends can understand why I even talk to you. You and your precious little Death Eater friends ... You’ve chosen your way, I’ve chosen mine.”