The Eyes of Slytherin.

Disclaimer: I don't own anything except the plot. So don't sue me. All Harry Potter™ characters and settings are the sole intellectual property of JK Rowling, Warner Bros. and various others who all aren't connected to me in any way. No money is being made with this fan fiction and no copyright infringement is intended.

Summary: Harry James Potter was not the only one with Avada Kedavra eyes. The Eyes of Death. The Eyes of Slytherin. A Dark Potter fic, but not in the way you expect.

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Why everything that's supposed to bad make me feel so good?

Everything they told me not to is exactly what I would

Man I tried to stop man I tried the best I could

But, You make me smile

Kanye West - Addiction

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Prologue.

He sighed. He hated Auror duty. And that combined with the work he did for Dumbledore and the Order was strenuous to say the least. But it was worth it. Just to see her smile. And adding to that, he was going to be a father soon! A Dad. He would have a child.

It's a beautiful thing, birth. A miracle. A phenomenon if you thought about it. Out of all the millions of billions of planets and stars and galaxies and universes there are, and you thought about how amazingly unlikely it is for you to be born is. It just boggles the mind.

'But that's muggle stuff.' He thought. That made him smile. But now was not the time to be thinking about muggles. He needed to hand this paper work in.

"Potter? Potter? Where the hell are you Potter? We've caught him! We've caught Karkaroff!" Shouted Mad Eye Moody as he stumped down the hall, to his office. As he entered the small room where he shared his desk with his best friend.

'Moody looks different somehow,' he thought and then out loud he said, "What happened to your nose?"

Moody's magical eye span round and focused on his nose. "Oh," he said. "The bastard hit it with a spell before we caught him. Anyway, hurry the fuck up, Potter. We're not waiting all day for you."

He looked at the aging wizard curiously. "Why do you need me? I've got a ton of paperwork to do…"

Moody sighed. "Come on Potter, we need a few more witnesses."

Moody grabbed him by the collar of his robes and brought him to one of the maximum security holding rooms. Once they arrived, Potter immediately recognised three other people already there; Junior Auror Kingsley Shacklebolt, Senior Auror Amelia Bones and Sirius Black.

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Chapter One: Addictions.

James watched the scene around him. People were dieing everywhere. On both sides. The Ministry had granted Aurors permission to use Unforgivables and they were using them. It was sick to think that ordinary wizards and witches could get to violent and hateful, as they had to when using an Unforgivable. And that's why they were called that – they were unforgivable.

But, according to the Ministry, right now, the End justifies the Means, because this could be it. The final battle. If only Voldemort showed. If he showed, then it could mean the end of the war. But everyone knew he wouldn't.

Voldemort would show when he thought the time was right.

But right now was a war. And his friends and colleagues needed him.

And that's when he saw one. A lone Death Eater. And the fucker was shooting killing curses randomly into fights. He was probably killing his own men as well, just to stay alive! James aimed his wand in the path of the Death Eater and shot his first Killing Curse.

A surge of power coursed through his veins as the sickly green spell shot through the air and hit the man in the chest, killing him instantly - and he liked it. Something flickered in the corner of his vision and James rolled out of the way as someone else's killing curse shot over his head. He smirked. His Quidditch reflexes came in handy. He knew it was a good idea, no matter how dangerous Lily said it could be.

James shot his own Unforgivable at the accused Death Eater, which hit him in the back. Again, James smirked. But this time, if anyone were to look into his eyes, they would have seen his normally warm, chocolate brown eyes turn an unusual shade of black, so dark, that it was impossible to tell where the pupil began and where the iris ended. Those were eyes of a killer.

Scouting round for another target, the young Auror saw Sirius being hit with the Cruciatus Curse by none other than Bellatrix Lestrange. James growled. He hated that woman with a passion. She killed and tortured mercilessly, she insulted him and his wife and even tried to kill his unborn child. And now she shot Sirius with that curse! She was Sirius's cousin! And yet she strikes him with the fucking torture curse! That bitch would pay.

Taking aim directly at her heart, he screamed 'Crucio,' wanting to make her suffer for everything she had done. The crackling, electric blue curse shot out of his wand and hit her directly where he intended.

The bitch fell to the floor, writhing in pain as James held the spell on, forcing as much hate and anger into the curse as he could. Bellatrix screamed. He kept it on until he could see the blood trickling down her mouth before he let go of the curse.

"How do you like it, Bella?" He shouted in her ear as he lifted her off the ground with the first year spell of 'Wingardium Leviosa.' "How do you like the feel of your own curse? It's not nice is it? Crucio!"

The curse hit her a second time and she fell to the ground once more. James smirked. It felt good. It was real power - and he had a taste for more.

Even though he knew the fight still raged, he couldn't resist playing with Bella. He cast the Cruciatus curse on her again, and again, and again, until finally her voice broke and more blood oozed from her mouth. James bent low to her and licked the blood from her cheek before whispering, "Have fun?"

He stalked off into the battle, sending more Killing curses at Death Eaters, every one hitting its intended target. If he had stayed a bit longer, he would have seen the woman lying on the floor take a pendant from inside her robes and say one word, "Master," Before disappearing from the front lines of this intense conflict.

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He felt sick. Physically sick. He hadn't known what came over him. It was if some unknown force inside of him took its chance and adopted control. But the thing that was making him sick was the fact that he enjoyed it. Not the killing. Not the torturing. He liked those parts. But that was the thing – he hated himself for liking it.

Right now, he needed to busy himself.

"James!" came a voice. 'Just in time.' He though as he looked for whom had called him. Sirius. "James! Lily needs you. St Mungo's just firecalled, she's gone into labour!"

"Shit!" James jumped out from his chair in the Auror Dep. and ran to the nearest Floo networked fireplace. He threw in a handful of Floo power, stepped in and yelled, "St Mungo's!"

He immediately disappeared from the Ministry into a cloud of emerald smoke. Although James had got used to travelling by Floo, this time was different. Once again, he felt the dizzying effect and motion sickness from whizzing at top speeds past all the Floo connected fireplaces in Britain before appearing at St Mungo's. James stepped out of the fireplace and ran up to the front desk, asking for the maternal ward.

James immediately sprinted to the stairs and bolted all the way up to the eighth floor, not stopping for breath. He counted along until he reached the correct room, Room 14… Room 17… Room 21… and finally, Room 24. He opened the door and stepped in.

After almost fourteen hours of the words, "Breath," and "Push," a beautiful baby boy was born at exactly Eleven Fifty-nine PM.

"Congratulations! You have a healthy baby boy." The Healer waved her wand over the child; vanishing the blood from him and drying him, before handing the baby to James, who began crying with joy.

"I can't believe it, Lils, we've got a son. I've got a son!" James whispered, tears running down his face as the sleeping form of his son wiggled in his arms. He passed the baby to his wife and sat down on the edge of the bed, kissing her over and over again, softly saying in her ear, "We're a family."

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Dumbledore turned up the next day, a sad expression on his face. He sat down on the other side of Lily, who was fast asleep, and turned to James.

"I'm afraid, I have some bad, but a bit of good, as well," Dumbledore began. "But, I believe we must wait for Lily to wake. Sherbet Lemon."

James shook his head, causing baby Harry to make a gurgling noise from his position in James arms, alerting Dumbledore to his presence. "Ah, this must be young Harry? I would offer him one as well, but I am guessing his is a bit too young for such sweet things."

James smiled and turned to Lily as she began to wake.

"Now we are all conscious, I have to tell you this piece of news. Yesterday, when I was interviewing for the new Potions and Divination professors, one of the applicants, a Sybil Trelawney, a descendant of Cassandra Trelawney, said something concerning young Harry…"

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Ok, that was the first chapter done! How do you like it?