Disclaimer: It's all Rowling's nothing is mine except the plot

Mindstorm

Chapter 2: Ambush

Harry slept well that night something unusual as he often would wake up drenched in cold sweat after a nightmare involving Sirius or a torture scene of some unknown person straight from Voldemort's mind. He dressed quickly as he didn't want to be late for Remus's class.

As he was running down the stairs he saw something that made him stop. On the left wall there were some black marks looking like they have been burnt into it. Deciding not to waste any time on this as it could as well be a prank of Peeves, he continued descending the stairs.

Entering the common room he saw his best friends Ron and Hermione waiting for him.

"Good morning mate did you sleep well?" asked Ron who was at the time trying to catch Pig, his tiny little owl.

"Yeah, I didn't have any nightmares even though yesterday I was completely paranoid from things Dumbledore told me.

"Are you still thinking about this Harry? Let it go, relax." Said Ron, now jumping from couch to couch trying to catch Pig who looked like he was enjoying this."

"Ron! Harry's safety is a very important thing." Yelled Hermione who threw a little ball for Crook shank's to catch.

Ron had just caught his owl and wore a triumphant look on his face when the cat in hot pursuit of the ball jumped on Ron and knocked him down from the couch he stood on, overturning a phial of potion which landed on his face and made his hair turn yellow with purple stripes. Laughing Harry exited the room dashing for the Great Hall.

The DADA lesson went very well as Harry demonstrated his Patronus charm. When the lesson was over the professor asked Harry to remain after class.

"What do you want me professor Lupin"

"Remus, Harry call me Remus. The reason I want you to stay behind is because I want to teach you something. It is a spell me and Albus want you to learn. You see at the place of the attack we found traces of some of the darkest magic, such darkness that is only radiating from creatures dipped in it. The spell is so powerful that can scare away even the devil in a matter of speaking. The spell is called "Lumos Puera"

Now say the incantation along with me while making a circular movement with your wand.

Harry got ready and waved his wand in a circular motion shouted "Lumos Puera". A ball of pure light appeared at the tip of his wand but it was different from the usual light the Lumos spell usually conjured. This was giving off a gentle heat that seemed to warm a person from the inside.

"Amazing! Harry if you can pull out such strong magic with the first try You-Know-Who is in trouble."

"Is it really so strong? It seems… easy compared to some other spells I've been studying."

"Well anyway. A last tip however: if you make a circle around yourself and then say the incantation you'll conjure a shield of light. Okay? Right, now what class do you have?"

"I have potions with Snape" answered Harry who have gotten an Outstanding at his potions so he had to continue them.

"Professor Snape Harry and I suggest you hurry up"

"Potter, why are you so late?" shouted Snape.

"Professor Lupin held me after lesson to tell me something"

"Detention tonight at eight o'clock"

"Bloody hell! He is such a git" said Ron, whose hair still had some black stripes, when Harry reached their desk, but unfortunately for him Snape heard him.

"Minus 20 points from Gryffindor for swearing and minus 10 for your hair Weasley" said Snape making the Slytherin part of the class rock with laughs.

Later during the afternoon the trio plus Ginny were sitting under their favorite tree by the lake even though the air was chilly. Harry had just finished telling her about the breach at the wards when she gasped and clasped her hand over her mouth.

"What?" asked Harry.

"The day it happened I had woken up from my sleep and I was looking at the grounds. I saw a man running to the Forbidden Forest and then firing some spells. There was an explosion and when the dust settled another figure, shrouded in darkness, was standing there. Then the figure turned into a dark wave that swallowed the man. After that I fell asleep again and next morning I thought it was just a bad dream."

"Well Hermione could you do some research at the library on what that thing might be? I however have to go to my detention with Snape" said Harry as he got up and started going back to the castle.

"Don't worry Harry I will search for some clues on what it might be." said Hermione.

Gryffindor tower, same time

Meanwhile a second Ron was descending the stairs to the common room with a satisfied smirk on his

face.

'And now to the dungeons' he thought.

Snape had of course prepared an extra gruesome task for Harry. He had to skin some very big worms with fangs and spikes.

'Skinning worms, why do worms have to be skinned?' he thought all the way through the detention.

It was almost midnight by the time he walked out of the classroom. Outside of the classroom he found Ron waiting for him.

"Ron what are you doing here?" asked Harry.

"I have something cool to show to you. Follow me"

"Are you sure? It is very late."

"Don't worry, come!"

Deciding not to object Harry followed his friend through some corridors until he reached a half-open door.

"In here" said Ron.

Harry entered the empty classroom but saw nothing of any importance.

"I don't see anything" he said as he turned to his friend just in time to see him raise his hand and shoot a ball of darkness at him. Harry dodged it and sought to him "What's the matter with you?"

"Fool! I am not your friend said" the imposter Ron with a heavy voice.

Harry readied his wand and shot a stunner at his enemy. The spell connected but nothing happened, instead the impostor shot his spell a rippling wave of dark energy and Harry sought "Protego" just in time to counter the spell.

"SECTUMSEMPRA IMPEDIA" the wave of power hit Ron who stumbled backwards but when he recovered Harry saw that were the spell had struck him it had revealed his true form which was darker than the night. Harry's mind clicked and he instantly knew what he had to do.

Making a circular motion with his wand he sought "LUMOS PUERA". The ball of light that appeared this time had something ferocious in it like it sensed that it had been conjured for fight. With a movement of his wand the sphere burst and the light soared through the room.

The imposter let out a scream as the light destroyed his disguise and revealed his true form: a man a bit taller than Harry shrouded in darkness that couldn't be penetrated even by the light. Then it ran away screaming and writhing in pain.

'I have to go back to the common room' thought Harry as he lay panting on the ground exhausted from the force of he spell.

A/N: So? What do you think? Please review and tell me your opinion.

Thanks to my reviewers so far.