Disclaimer: I don't own Harry Potter.

Forward: A surprisingly large number of people wanted me to continue the idea in my second chapter of 'Odd Ideas' and I am sorry to have to disappoint them by not writing any more of that. I tried, I really did. I just couldn't write anymore about Harry and his 'love kitty' I did write a bit more for the other idea. Again, I'm sorry but I just can't write a Harry McGonagall lemon.

CONSTANT VIGILANCE !

The station was filled with tearful good byes as family's put their children on the train to Hogwarts, no one noticed the two figures enshrouded in shadow.

"Well," Moody's eye spun. "You know what I expect you do, so get to it."

"Yes father," Harry's eye spun as he regarded the world with suspicion. "Do I have your permission to deal with any situations that might crop up?"

"Course ya do son," Moody nodded and took a sip from his flask. "Just remember to keep a low profile."

"Yes father," Harry took a sip from his flask. "Will that be all?"

"One more thing," Moody had a lump in his throat. "Constant Vigilance."

"Yes father," Harry blinked away the forming tears and quashed the urge to hug his father, "you too."

"That's me boy," Moody smiled as he watched his son disillusion himself.

Harry silently boarded the train and set to work. After erecting several wards over his chosen compartment, he set out to find the snack cart.

"Why hello dear," the woman pushing the snack cart smiled down at the odd little boy with the spinning eye. "Couldn't wait for me to get to your compartment?"

"Petrificus Totalus," Harry glared down at the unmoving woman as he dragged her into his compartment. There was no way that he was going to fall for that old trick.

It took Harry twenty minutes to determine that the food in the cart was not poisoned, at least not poisoned with any poison that he could detect. Harry took a sip of his flask, and another fifteen minutes of questioning the woman with truth serum to determine that. Whoever she was, it didn't look like she was planning to kill him.

Looking down at his prisoner, Harry weighed his options.

"What are you going to do?" The snack cart lady asked fearfully.

"Obliviate," Harry frowned.

The woman blinked as she found herself standing in front of her snack cart, her eyes widened when she checked her watch. She was running late, those poor children that had gone so long without food.

Harry frowned as he watched from his place in the shadows, he had stayed in one place for two long. It was time to move.

Harry was clinging to the bottom of the coal car when the Hogwarts express pulled into the station, carefully waiting until all the students had disembarked. He dropped to the ground and began to follow.

IIIIIIIIII

Minerva looked down at the next name on her list, after Sally-Anne Perks was . . . it took all of her immense will power to keep her stern expression. "Ha . . ." She froze as she felt the point of a wand dig into the back of her neck.

"You weren't planning to call my name out for all to hear were you?" Asked a child's voice that was filled with menace, "why don't we just skip to the next name."

"And why would I do that?" Minerva asked with a frown.

"Because if you don't . . . " The child gave a horrible and unseen lear, "then we'll have to see if the school's healer can reattach heads."

"I see," Minerva's frown deepened. "I suppose that you could walk up to the hat without having your name called out."

The child let out a wheezing laugh that would have sounded more menacing if it hadn't been so high pitched, "you expect me to walk up there in front of everyone? I don't think I'll be doing that."

"I suppose we could have a private sorting in the Headmaster's office later," Minerva smiled as she contemplated the amount of detention she was going to give to the little . . . angel that was holding her at wand point.

"You suppose wrong." Harry frowned, "I'm not going to let anybody go through my mind."

"Then how exactly are you planning to pick a house?" Minerva was two seconds away from doing something . . . regrettable.

"Not planning on having a house," Harry cackled and tossed a small object out into the center of the great hall.

Every eye in the room followed the object, which exploded in a flash of light when it hit the side of the Ravenclaw table.

"CONSTANT VIGILANCE." Harry screamed at the room full of temporally blinded students and staff, before turning to disappear through one of the unguarded doors.

"ALBUS," Minerva's streak cut through the noise made by the panicking students. "We're going to have a meeting after this."

Albus Dumbledore, a man regarded by many to be one of the most powerful men in the world let his smile slip. Things were not going the way he had planned, and for some reason he had a feeling that it was going to be one of those decades.

IIIIIIIIII

"Albus, what's wrong?"

The old wizard blinked, "I think I've been obliviated."

"What?" Minerva pulled out her wand and began eyeing the shadows suspiciously, "how can you tell?"

"I'm a master Legilimencer," the old wizard blinked. "And I have a faint aftertaste in my mouth that leads me to believe that I've been given Veritaserum. I remember that I was walking to my office to have our meeting and I think I heard one of the students yell something, after that it's a blank."

"What did the student yell?" Minerva knew that she should have taken early retirement when it was offered, but noooo she had to decide that instructing Harry Potter was more important than lounging on a beach in the tropics.

"I think it sounded like 'Constant Vigilance' or at least something that sounded like it," the old wizard winced. "I would really like to know how a first year was able to pull this off."

"Isn't that what Moody is always yelling?" Minerva asked with a frown.

"Minerva," Albus frowned. "Talk like that could get a person written out of a story, authors don't like it when plot holes are pointed out."

"Oh," the Transfiguration Professor paused for a second. "What I meant to say was that I don't suspect a thing."

"Neither do I Minerva," Dumbledore's eyes twinkled. "Neither do I."

IIIIIIIIII

Over the next few weeks, a wave of terror swept over Hogwarts. No one was safe from the thing that stalked the castles halls. It struck like lightning screaming its catch phrase 'constant vigilance' and left its victims dazed and obliviated. Day after day and week after week, more people fell to the creature's magical might until one day . . .

"What's all this?" Snape screamed at the young blood covered boy he found standing in front of one of the girl's toilets.

"What in heavens name happened here?" Minerva's sharp voice asked only seconds later.

"Petrificus Totalus, Petrificus Totalus." Harry glared down at the two Professors as he cast a dozen or so charms to prevent them from moving or posing any kind of threat, "troll in the castle."

"If you even think about Obliviating me," Minerva began in a low hiss. "I'll give you detention for the next eight years."

"How did you know that I was planning to obliviate you?" The small boy with the whirling eye asked.

"Because you haven't bothered to replace memory's with anything," Snape's face showed condescending sneer number fifteen. "What are you an idiot?"

"I'm eleven years old," Harry's voice was flat. "And I'm the one with the wand, what does that make you two?"

"Why you little . . ."

"Though I do have to thank you for the idea," Harry's smile looked sinister (he was trying to look inocent). "Obliviate."

"What did you do to them?" It appeared that the silencing spell that Harry had earlier placed on the bushy haired little girl had worn off.

"Obliviated them," Harry turned away from the unconscious professors. "And now for you . . . don't worry, this . . . won't hurt . . . a bit."

"You can't obliviate me," the young girl insisted.

"Sure I can," Harry couldn't figure out why he was having this conversation. "All I gotta do is wave my wand and say the incantation."

"No," the young girl looked angry. "I mean that if you obliviate me, I could die."

"What?" Harry frowned, "I've obliviated hundreds of people and none of them have died . . . well not from being obliviated anyway."

"If you use magic to modify or erase the memory of a person that may have a head injury," the girl began lecturing. "Then there is a good chance that you will cause permanent damage or death."

"Pops told me something like this might happen some day." Harry grit his teeth thinking back to his father's instructions. "And he said that he had faith that I would do what was necessary."

"Son," Moody leered, "there may come a time when for some reason or another, you won't be able to erase someone's memory."

"What should I do?" Harry asked with a puzzled frown.

"Well, the easiest thing to do would be to kill them. The other thing you could do is seduce them, depending on how your tastes run." Moody winked, "just use a bit of the old 'Moody Charm' and you'll have the lasses eating out of your hand."

"Come with me and we'll get this over with as soon as possible." Harry pulled himself out of the flashback, "I've got things to do and people to . . . talk to."

Hermione shuddered, "what are you going to do?"

"Gonna seduce you of course," Harry gave a horrifying smile. "Just need to use a bit of the ol' Moody charm and you'll willingly defect to my side."

IIIIIIIIII

"What happened to you two?" The Headmaster woke his unconscious staff members.

"Golly gee Mr. Wizard," Snape's voice sounded a bit more . . . high pitched than normal. "I was just walking down the hallways and I found Minny crouched over the body of a troll feasting on its bloody remains."

"And you Minerva?" Albus turned to his other Professor.

"The last thing I remember is that brat defeating my flying monkeys and melting me with a bucket of water.

"I see," Dumbledore sighed again. Things had been so much easier in the old days.

AN: Here it is, I might have another part or two of this to write or I might not. It all depends on how my life is in the future. I am sorry that I am not updating as much as I would like but work is taking up a large amount of my time at the moment. Yes everybody is OOC, I do not need a dozen reviewers telling me that an eleven year old could not defeat Dumbledore, I don't need people telling me that Harry would never go around cursing people. This is all just for fun.