Dumbledore's Mistake
Prologue:
Voldemort was very pleased. Not only was that pathetic fool Potter dead, but his Mudblood wife had just breathed her last. Cackling to himself he was looking forward to this killing. Oh yes, the Potter brat would die just like his dear parents. He sneered at the thought.
Walking towards the crib holding the wailing child Voldemort hummed with excitement. For with this kill not only would the prophecy no longer matter, but his goal of seven would be in sight. Oh how he had waited for this moment. So with a slow measured breath he carefully raised his wand to the boys head. Yes, he thought, this would be the death to the last of those pathetic muggle loving Potters. It would also be the death to that great twinkling fools last hope of ever stopping him; the Great Dark Lord Voldemort.
He was no fool. He knew Dumbledore's plan.
So with an evil laugh Voldemort in his madness looked the child in the eyes before those fatal words left his lips.
"Avada Kedavra"
But it did not go as planned. For with those words his soul was thrust out of his body. He could feel his power leaving him. And for the first time Voldemort truly felt fear. He could not leave the crumbling home fast enough.
Yet something curious happened while he was leaving. Not only was his body being burned in a white fire, but this fire seemed to latch unto anything dark. This included a part of his torn soul. A part that was determined to make the Potter brat pay.
This part of the Dark Lord did not like what had happened. And in it's rage decided it was going to attach itself to the boy. So despite the white flames licking at it, the soul-fragment went for the lightning-bolt shaped scar that was now evident on the brat's forehead. The soul-fragment thought it to be a good place to take residence for the dark magic coming from it would allow it to stay.
But once more Voldemort was rebuffed. For when the soul-fragment went to take residence in said scar a blinding white light shone throughout the house. The fragment had been purified, and so had the scar only leaving trace amounts of evidence of being there. Being a slightly irritated red instead of the black it had been only moments before. Evidence that one day it would heal.
The bright light with the white flames meant the end of the soul-fragment. It strangely felt a sense of peace and acceptance before it was taken into the light.
But before it left it saw that its fight to kill the brat had left him with something, something that even it wasn't sure what it would do to the boy's life. Only time would tell.
The exposure to so much dark magic and doing so much accidental defensive magic left Harry drained and exhausted. So before Hagrid even arrived; Harry Potter was asleep regaining his strength and not knowing what the actions of this night would bring in the future. Nor the part he would have in it.
Author's note:
Edited 5/25/2015
Mostly just punctuation and a few words for a smoother transition.