From a young age Harry Potter knew not to speak out of turn, not to ask for more food, not to complain and above all not to display his freakishness in front of his relatives. He knew at the tender age of four what a cane feels like on skin and he knew by the age of six what it feels like to be starved for over a week. By age nine Harry Potter had completely lost touch with his emotions, he no longer cared about what was right and what was wrong and he finally realized that the only thing that mattered was power.
Over the first ten years of his life Harry Potter suffered a lot, but in his suffering he learnt a lot about survival. After all what does not kill you makes you stronger right?
The first thing Harry learnt was how to act, so he could always put on a face of innocence in front of his relatives, not that his innocence ever stopped them from hurting him but it did stave away the questions of the teachers at school and the nosy neighbors.
One of the key constants that Harry was exposed to from a young age was the sight of his own blood and over time he developed a fascination for blood itself. The rich dark red color, the texture, the smell and taste of blood, it was the first thing Harry truly loved; or would have loved if he could feel love. He killed his first animal at age six, it was his birthday, the Dursleys had gone out for the day and had left him at Mrs. Figg's house as usual. Harry was in a bad mood and wanted to vent his anger at something and there it was a young kitten not more than a few weeks old staring at him from under the couch. Slowly harry reached out to the Kitten with an innocent looking smile on his face and gently picked it up in both hands, with soft steps Harry walked outside and made sure he was hidden behind one of the bigger bushes around the house. Once he ensured that there was no one around to interrupt his fifteen minutes of fun, in one swift motion Harry pulled out his handy pocket knife and slit the throat of the kitten. A small but true smile crept onto his face as he watched the blood drain from the kitten's neck onto his hands. He considered this his best birthday ever. On that day Harry learnt what it felt like to have power over another's life, he learnt that he enjoyed this power immensely and it was this realization that led to a promise to himself to seek more power so that he would never be weak again.
Another key constant that Harry experienced from a young age was the random and seemingly impossible events that regularly happened around him. He would grow his hair back when his aunt cut it badly. He would teleport when he did not want to get caught by Dudley and his gang and more recently his body seemed to resist some of the damage it was taking, where before there were broken bones now there was only large bruising. He knew that his "family" was not holding back and judging by their exhaustion after a beating session it seemed like they were putting more into the beating than before. By age nine Harry had learnt to control this "power" for the lack of a better term, he could now concentrate really hard and teleport at will, he could grow his hair and even change its color(not that he ever did this in front of his relatives) and finally he could feel the energy coursing through his body and he mentally created a barrier using this power around his entire body now he would not even bleed when stabbed by a knife and the beatings he got from his uncle and cousin no longer left a mark on him.
While he discovered that he had a lot of "powers" in his arsenal there was one that felt different from the others and that was his ability to control blood, it was the first of his abilities to manifest as Harry was no stranger to blood and over the years harry learnt to hone it to a degree where he could control his own metabolism so he did not need to eat much, he could stop wounds from bleeding just by willing it and more recently he discovered that he could kill small animals by forcing their blood out of their bodies. The last one pleased him the most.
On Harry's tenth birthday his uncle sent his aunt and cousin to his sister's place to spend the weekend. Then for the rest of the day he completely ignored Harry and spent the time getting drunk on a bottle of whiskey.
Finally at around 9 P.M Vernon Dursley walked into the kitchen and slurred "Happeyh birthday Boy! I have a present for you right here".
Slowly he started fumbling with his belt buckle, at this point Harry merely thought he was in for another beating at the hands of his uncle and was already making sure his protective barrier was in place. But as he looked up into his uncle's eyes he saw something there that once again put fear into his heart. By then the belt was lying on the floor forgotten and his uncle was pulling his pants down, Harry's eyes widened in realization on what was happening and in response to this his power reacted by lashing out and blasting his uncle backwards into the sink. This was the first time young Harry used his power offensively against a human, the paramedics bought his excuse of his uncle falling down and hitting his head on the kitchen sink because of his acting skills and the Blood alcohol content of the dead man. By the time Petunia and Dudley got back the house was cleaned and only Harry was left to greet them.
With a smile on his face and a soft voice Harry spoke to his Aunt. "Not going to accuse me of killing him? After all I am the scapegoat for all the wrongs that happen on this side of the world".
His aunt looked at him with a look of utter disgust and shrieked " You ungrateful brat you killed my husband, don't you deny it, we should never have taken you in.".
With his smile widening Harry said "I'm not denying anything, he would have lived if I called for help after he fell, but no I watched him bleed out slowly as he pleaded for his life." In reality Harry actually made sure the wound stayed open using his ability to control blood. " It was pathetic, once he was dead for sure I called the ambulance and put up an innocent face and told them a sob story of how I tried to stop the bleeding."
"Oh officer there was so much blood, I.. I.. couldn't do anything" the more Harry talked, the more his aunt's face paled. Finally after over five minutes of the best entertainment he had, had his whole life Harry stopped laughing and looked at his Aunt directly in the eye.
"There are going to be some changes here." When his aunt made a motion to hit him he hastily continued "or maybe tomorrow Dudley here falls off the school roof?"
That comment drained what little blood was left in his Aunt's face. "You wouldn't dare."
Harry let out a loud laugh and replied "It would be the happiest moment of my miserable life Dear Auntie."