[ WP ] Harry Potter is actually sorted into Slytherin on his first day at Hogwarts . Write the ending of the series .

Harry entered the clearing in the Forbidden Forest, his disembodied head visible over the folds of the Cloak. The Resurrection Stone hung from his neck on the chain that had once belonged to the now-destroyed Locket of Slytherin, the fragment of soul inside destroyed with the sword that was strapped to his waist. The gleaming blade of Godric Gryffindor, the one artifact of Hogwarts' founders Voldemort had never been able to find, weighed down on his hip as he took the last steps towards the site for his surrender. 
 
 `` *Impedimenta! *'' yelled a Death Eater defensively as Harry's floating head appeared from behind a tree. The Dark Lord's orders had to be followed -- the boy could not be killed -- but his wand was already raised, doubtlessly for a Killing Curse. 
 
 `` *Avada Kedavra, *'' Harry muttered, the beams of magic crossing for a half second before the green curse overpowered the Death Eater's spell. The corpse collapsed to the ground and Harry continued into the semicircle of Voldemort's followers. 
 
 `` Harry Potter,'' the high, cold voice of his nemesis whispered. `` The Boy who Lived.'' Voldemort turned around, the Elder Wand in his hand. Harry's gaze alighted on the weapon, its power almost mesmerizing. This, he knew, would make him the master of death itself. 
 
 `` Good evening, Tom,'' Harry replied, brushing the Cloak around his back to show him the sword he carried. 
 
 `` Ah, the sword of Gryffindor,'' Voldemort smiled. `` So kind of you. With your death, I can begin to reclaim what you've taken from me.'' 
 
 `` I want the Wand, Riddle.'' Harry's voice was insistent and commanding, his green eyes locked on Voldemort's red. 
 
 The Dark Lord laughed. `` I should have known you did n't come here to surrender,'' he said. `` But this... this is more foolish than self-sacrifice. To expect that I will give *you* the Elder Wand!'' 
 
 `` Only the snake remains, Tom,'' Harry told him. `` You could n't kill me as an infant, and you only have one Horcrux left. You should be fearing for your life, not demanding mine.'' 
 
 Voldemort's brow furrowed and eyes narrowed in anger. Nagini hissed. `` *Do not mention my Horcruxes, Potter! *'' the snake's mouth spoke in Parseltongue while Voldemort gestured a pale, bony hand towards the Death Eaters. 
 
 `` I will not offer again. Give me the Wand and die in Azkaban or refuse and I can kill you here,'' Harry stated, extending his hand. Voldemort raised his wand in reply. Harry glared into his enemy's eyes, a glance filled with rage. Voldemort would die, felled by his own hubris. 
 
 `` But first, kill me,'' he said, throwing the holly stick to the side and opening his arms towards Voldemort. `` If you can.'' The Wand was his regardless, and so much the better if Voldemort purified his soul. 
 
 There was a second of hesitation on the Dark Lord's part. And then the wand was raised, the taut, colorless lips screamed a curse, and the Elder Wand descended in a flash of green. 
 
 -- 
 
 Pure, white light surrounded Harry, and for a second he was in a luminous room with the vaulted ceilings and train platform of King's Cross. But the next he was on the ground of the forest, his wand next to his cheek in the dirt and the pain of Gryffindor's Sword digging into his side overpowered by an ache that penetrated his entire body. He fumbled for his glasses, which had fallen off, and slowly put them on as he blinked, the pain of Voldemort's Killing Curse fading. 
 
 `` Is he dead?'' Voldemort demanded, rising to his feet with Bellatrix's aid. He, too, had collapsed, as Harry could see from the translucent folds of the Invisibility Cloak that now covered him. 
 
 `` He just vanished,'' Bellatrix explained. 
 
 *The Cloak. * Harry covered his body with the enchanted fabric, rising slowly and silently walking towards Voldemort. He could not chance taking his wand; it was outside of the Cloak and he was lucky enough already to have it conceal him. There were a hundred Death Eaters who could easily kill him, and while Nagini lived, Voldemort was still immortal. 
 
 Careful to be silent, Harry maneuvered over towards the snake while Voldemort regained his own strength. The Dark Lord walked towards the place where Harry had stood, the snake trailing after him through the twilight. It drew ever closer, and Harry's hand firmly grasped the pommel of the weapon, silently drawing it from its sheath. 
 
 Voldemort screamed and collapsed to the ground, clutching his head and gasping for breath. The severed head of the snake struck the moist earth, its blood dripping on the blade of Gryffindor's sword, held in Harry's hands. He swung the weapon again, this time at Bellatrix, and caught her neck with the tip of the silver as she whirled around. 
 
 Voldemort was close enough to touch. He raised the Elder Wand once more, extending his arm desperately towards Harry and screaming the Killing Curse. 
 
 `` *AVADA KEDAVRA! *'' he bellowed as Harry grabbed the Wand with his free hand. 
 
 The beam of magic struck Harry square in the face, knocking his glasses to the ground. But he stood, and remained standing, as Voldemort's grip on the Wand weakened to nothing and he collapsed to the ground, backing away frantically from Harry. Killing Curses from the surrounding Death Eaters bounced off him harmlessly as he advanced. 
 
 `` *How? *'' he whispered, looking at the boy he had tried to murder so many years before. The impossible boy, the child that should have died at his hands. An infant, standing against the most powerful wizard who ever lived. 
 
 Harry smiled, equal measures elation and fury. `` I AM DEATH!'' he screamed in a thousand voices, raising his arms upwards and turning his head to the sky. The Death Eaters in the clearing fell together and a black mist rose from their bodies, rapidly dissipating in the rising winds. 
 
 Voldemort crawled backwards as Harry approached him, his red slits for eyes widened in pure terror, moving until his back struck a tree and he could move no more. Harry placed the tip of the Elder Wand in the center of Voldemort's head, touching the pale skin between his eyes. 
 
 `` Please...'' 
 
 `` *Avada Kedavra. *'' 
 
 There was a flash of blinding green light, and a noise like a rushing wind. Tom Marvolo Riddle slumped to the ground weakly, his body aged, withered, and worn, the light gone from his crimson eyes that looked depthlessly into the void. 
 
 And suddenly Voldemort gasped, his body shooting upright, grabbing his chest as his heart restarted. 
 
 `` That was for my father,'' Harry said, his voice sinister and low. `` We're going to be here a while.''
