The Dark Lord stopped outside the closed doors to the Defence classroom, which had been renamed by the two Death Eaters he had posted here in Hogwarts; Amycus and Alecto Carrow; they called it the Dark Arts. He could feel Potter's presence on the other side; it was agitated in suspense. Then with a burst of fury, he blew the doors inward, they slammed against the wall on either side of them. It was there in the classroom that he saw Potter, standing in the middle, wide eyed and staring back at him.
He approached the teen, while he felt the boy's emotions tremble in slight fear; he was amazed at how Potter had the audacity to just stand there, head held high in defiance. 'True bravery,' thought the Dark Lord, as he stepped closer and closer to the boy, 'was not the absence of fear, but that there was something more important than that fear or it could just be foolishness.' Moreover, indeed, he thought the boy a fool, perhaps a clever fool but a fool nonetheless and Lord Voldemort would take whatever he wanted.
Now having viewed that memory, he had to ascertain whether the boy was really a horcrux, even if he was an unintentional one. If he was than Potter would need to be protected, for surely there would be others that sought to destroy the Dark Lord and anything that made him immortal; just as the boy had done and that could not be allowed. The container for a horcrux had to be prepared with a dark incantation, thereby allowing whatever the object was to become a horcrux and house a piece of the castor's soul and then that object would tether the castor to the mortal realm, preventing true death from taking them. Still, he had never used that spell on Potter, therein laid the mystery, an enigma that would have to be thought over later. There was no known spell to check if an object held a piece of fragmented soul, which made what he was about to do very painful for the boy.
However, before he tried anything with Potter, he wanted him disarmed. He held out an upturned hand, long spidery fingers stretched out. He did not trust that the boy would keep his word of surrender, it was better to take away Potters last defence in case he tried to escape. The Dark Lord waited in silence as Harry swallowed uneasily and slowly handed over Draco's wand. Voldemort quirked a hairless eyebrow up at Harry in question.
"My wand is broken," Harry, whispered, it was almost inaudible. Voldemort heard the quiet response as he wrapped his fingers around the dragon-heartstring wand and placed it into his robes pocket. 'So, you stole Draco Malfoy's and now he has to use his mother's wand.' Thought the Dark Lord snidely, Draco Malfoy was punished dearly for that night when he let Potter and his friends escape from Malfoy Manor, the other Death Eaters that were there were also punished for being completely useless idiots.
"There is no spell to detect a horcrux," Voldemort stated slowly, "However, if you are a horcrux and one of mine, I will be able to tell. If you are not, I will kill you and parade your corpse in front of your friends."
Harry quickly nodded his head, his mouth felt dry, "How will you tell?"
"It will not be simple," Voldemort replied, suddenly grasping Harry's face with both of his hands. Harry screamed out in agony as the pain from his scar became unimaginable, his knees would have buckled right then if it were not for the Dark Lord holding him in place, somehow he could still hear Lord Voldemort of the din inside his brain. "I am going to search your entire being with my magic and if it detects familiar magic, my own inside you, than I will know."
The whole sensation was very unpleasant, Harry's world became one of intense pain. The muscles in his body contracted tightly, his bones felt like they were being broken, every single one. Harry thought for sure that this is what dying would feel like, for surely he could not live with this pain. A foreign but familiar presence swept through his body, touching him in places he did not know existed. Lord Voldemort's magic was thorough as it searched his body for something like itself, something that was hiding. Then Harry felt the recognition inside his soul, Lord Voldemort had found it. The Dark Lord let go of him abruptly, all but throwing Harry to the floor. Harry felt Voldemort's rage and hoped he would not be the recipient, but he need not have worried, as the Dark Lord turned his wrath upon the classroom instead. Desks, chairs and other school equipment were sent flying into the walls of the classroom, splintering into pieces upon contact with the Caen limestone.
Lord Voldemort laughed a high pitch laugh; it sent chills down Harry's spine, it was not just the chilling laugh, but the twisted emotions coming from the monster in front of him that scared Harry the most. Voldemort then turned to face Harry, lifted his wand and yelled "Stupefy."
The Dark Lord watched as Harry Potter's body went limp and fell unconscious, his head hitting the floor. He studied the teen for a little bit, 'how carefree he looks asleep,' thought the Dark Lord, 'this bird will be caged until I figure out what to do with him.' Lord Voldemort could not fathom how Harry Potter ended up a horcrux, the how made little sense. Nevertheless, he was one and that made him feel three things, confusion, fear and then anger. How he wanted to rip the boy to shreds, it would be so easy, but he could not. He could not risk damaging the soul piece within, that Potter had been unwittingly protecting for most of his short life.
Mentally shaking himself from those thoughts, Lord Voldemort went over to one of the windows lining the back wall of the classroom, opened it and shot a Morsmordre into the sky above Hogwarts. The colossal skull formed with a snake protruding from its mouth, it appeared to be made of glittering emeralds, and it blazed in a haze of green smoke. The symbol in the sky would alert his Death Eaters to come and seize the castle, no matter who stood in their way.
He levitated the boy and went back down the way he came, with Potter floating along behind him. As he reached the entrance hall, he could hear the insane laughter of his most devoted follower, Bellatrix; she had been the first to arrive. However, there were other screams too, screams of pain, fear and anger. The Death Eaters and the surviving Order members were locked in a deadly battle; the D.A. however, had created a shield that was protecting them from flying debris and wayward curses.
Before entering the entrance hall; he placed a protection spell over Potter's unconscious form to protect him from harm and then Voldemort entered the fray with Potter in tow. Bellatrix Lestrange was laughing again as she shouted the Cruciatus Curse at a teenage girl, her flaming hair reminded the Dark Lord of Potter's mother, this must be the Weasley girl. She was not with her friends behind the shield; it seemed she would die fighting for a lost cause.
As Ginny Weasley screamed and writhed in agony, Mrs. Weasley came charging through the battle, deflecting spells as she went. The woman was on a mission; she raised her wand and yelled at the top of her lungs, "Not my daughter, you bitch!" She proceeded to jab her wand forward and shouted, "Confringo." The blasting curse flew from her wand and straight towards Bellatrix; the curse was dangerous and could be lethal, since it tended to make its targets explode, depending on the power behind the spell and Molly Weasley was pissed.
The Dark Lord raised his wand to deflect the curse, his deflection spell collided with the blasting curse and caused a ripple effect to occur, which threw both Bellatrix Lestrange and Molly Weasley away from each other, but it took its fair share of other Death Eaters and Order members with it.
"Enough!" Voldemort's voice boomed out over everyone, "I have won; I have Harry Potter your beloved saviour. He is not going to save you now; he would rather sleep in my dungeon for all eternity. However, as an act of kindness for his surrender...I offer you all a chance to pledge your allegiance with me, for some of you have qualities I value."
Voldemort paused surveying the remaining members of the Order of the Phoenix with distaste, his eyes scanned over to the children behind the magical shield and said, "I now speak directly to those who decided to shield themselves instead of fight, you have chosen wisely, your punishments will not be as severe." They all would be imprisoned, until he deemed them loyal to the new regime, some he knew would never and they would be executed, the Dark Lord gestured to his Death Eaters to round everyone up and take them to Azkaban prison to await their trials.
Lord Voldemort had more important things to attend to; he glanced over his shoulder at the still form of his captive and proceeded to levitate him out of Hogwarts and disapparated them both away.