Eliezer Yudkowsky - Harry Potter and the Methods of Rationality

"So the obvious question is who's gained too much power too quickly," Moody said abruptly. "And it turns out that there's a fellow who's gone and banished the Bandon Banshee, staked an entire rogue vampire clan in Asia, tracked down the Wagga-Wagga Werewolf, and exterminated a pack of ghouls using a tea-strainer. And he's milking it for all it's worth; there's been talk of the Order of Merlin. Seems to have turned into a charmer and a politician, not just a powerful wizard."

"Dear me," murmured Dumbledore. "Are you certain that he is not relying on his own skills?"

"Checked his grades," Moody said. "Record shows Gilderoy Lockhart received a Troll in his Defense O.W.L.S., didn't bother with the N.E.W.T. Just the sort of sucker to take the deal Voldie was offering." The blue eye whirled crazily within its socket. "Unless you remember Lockhart as a student, and think he had enough potential to do all that by himself?"

"No," said Professor McGonagall. She frowned. "Not a chance, I should say."

"I fear I must agree," Dumbledore said with an undertone of pain. "Ah, Gilderoy, you poor fool..."

Moody's grin was more like a snarl. "Three in the morning work for you, Albus? Lockhart should be at his home tonight."

Harry listened to this with increasing alarm, wondering if even the Ministry had any rules about magistrates needing to issue warrants - never mind the illegal vigilante organization Harry now seemed to have joined. "Excuse me," Harry said. "What exactly happens at three in the morning?"

There must have been something in Harry's voice that gave him away, because the scarred man whirled on him. "You have a problem with that, boy?"

Harry paused, trying to figure out how to phrase this to the stranger -

"You want to take him down yourself?" pressed the scarred man. "Get revenge for your parents, eh?"

"No," Harry said as politely he could. "Honestly - look, if we knew for certain he was a willing host for You-Know-Who, that's one thing, but if we're not sure and you're heading off to kill him -"

"Kill?" Mad-Eye Moody snorted. "It's what's locked up in his head," Moody tapped his forehead, "that we need from him, boy. If we're lucky, Voldie can't wipe the sucker's memories as easy as in his living days, and Lockhart will remember what the horcrux looked like."

Harry mentally noted down the word horcrux for future research, and said, "I'm just worried that someone innocent - what sounds like a pretty decent person, if he did do all that himself - might be about to get hurt."

"Aurors hurt people," the scarred man said shortly. "Bad people, if you're lucky. Some days you won't be lucky, and that's all there is to it. Just remember, Dark Wizards hurt a lot more people than we do."

Harry took a deep breath. "Can you at least try not to hurt this person, in case he's not - "

"What is a first-year doing in this room, Albus?" demanded the scarred man, now whirling to face the Headmaster. "And don't tell me it's for what he did when he was a baby."

"Harry Potter is not an ordinary first-year," the Headmaster said quietly. "He has already accomplished feats impossible enough to shock even me, Alastor. His is the only intellect in the Order which might someday match that of Voldemort himself, as you or I never could."

The scarred man leaned over the Headmaster's desk. "He's a liability. Naive. Doesn't know a bloody thing about what war's like. I want him out of here and all his memories of the Order wiped before one of Voldie's servants plucks them straight out of his mind -"

"I'm an Occlumens, actually."

Mad-Eye Moody directed a narrow look at the Headmaster, who nodded.

And then the scarred man turned to face Harry, their gazes meeting.

The sudden fury of the Legilimency attack almost made Harry fall off his chair, as a blade of white-hot steel cut into the imaginary person at the forefront of his mind. Harry hadn't had a chance to practice since Mr. Bester's training, and Harry very nearly lost his grip on the imaginary person the back-of-his-mind was pretending to be, as that person's world turned into searing lava and a furious probe of questions. Harry almost lost his grip on only pretending to hallucinate, only pretending to be the imaginary person that was screaming in shock and pain as the Legilimency tore apart his sanity and reshaped him to believe that he was on fire -

Harry managed to break eye contact, dropping his eyes to Moody's chin.

"You're out of practice, boy," Moody said. Harry wasn't looking at the man's face, but his voice was deadly grim. "And I'll warn you of this but once. Voldie isn't like any other Legilimens in recorded history. He doesn't need to look you in the eyes, and if your shields are that rusty he'd creep in so softly you'd never notice a thing."

"Duly noted," Harry said to the scarred chin. Harry was more shaken than he'd have admitted; Mr. Bester hadn't been anywhere near that powerful, and had never tested Harry like that . Pretending to be someone hurting that much had... Harry couldn't find words for describing what it felt like to contain an imaginary person in that much pain, but it hadn't been normal . "Do I get any credit for being an Occlumens in the first place?"

"So you're think you're all grown up already, eh? Look me in the eyes!"

Harry strengthened his shields, and looked once more into the dark grey eye and the brilliant blue.

"Ever watched someone die?" asked Mad-Eye Moody.

"My parents," Harry said evenly. "I recovered the memory in January when I went in front of a Dementor to learn the Patronus Charm. I remember You-Know-Who's voice -" A chill went through Harry's body, his wand twitching in his hand. "My main tactical report is that You-Know-Who could speak the Killing Curse in less than half a second, but you probably already knew that."

There was a gasp from Professor McGonagall's direction, and Severus's face had tightened.

"All right," Mad-Eye Moody said softly. A strange, thin grin twisted up the lips within the scarred face. "I'll make you the same offer I'd make to any trainee Auror. Land one touch on me, boy - one hit, one spell - and I'll concede your right to talk back to me."

"Alastor!" exclaimed Professor McGonagall's voice. "Surely that's an unreasonable test! Mr. Potter, whatever his other merits, does not have a hundred years of fighting experience!"

Harry's eyes made a lightning dart around the room, passing over the peculiar devices, glancing past Dumbledore and Severus and the Sorting Hat, settling briefly here and there. Harry couldn't see Professor McGonagall from where he was, but that didn't matter. There was only one device he'd really wanted to look at, and the point of all the other glances had just been to conceal which one.

"All righty," Harry said, and hopped off his chair, ignoring Professor McGonagall's inhalation and the Potions Master's snort of disbelief. Dumbledore's eyebrows had lifted, and Moody was grinning like a tiger. "Be sure to wake me up in forty minutes if he does get me." Harry settled into a duelist's starting stance, his wand held low. "Let's go, then -"

Harry opened his eyes, his head feeling like it had been stuffed with cotton wool.

Everyone else was gone from the Headmaster's office, the Floo-Fire dimmed; only Dumbledore still waited behind the desk.

"Hello, Harry," the Headmaster said quietly.

"I didn't even see him move, " Harry marvelled, muscles creaking as he sat up.

"You were standing two paces away from Alastor Moody," said Dumbledore, "and you took your eye off his wand."

Harry nodded, as he took the Cloak of Invisibility out of his pouch. "I mean - I was taking the dueling stance so that he'd think I was a standard idiot and underestimate me - but I have to admit, that was impressive."