Harry nodded to himself as he prepared to enter meditation. He had been planning all of this mentally for the whole day. He had planned to do it at night when the Dursleys were guaranteed to be in bed. This was delicate enough as it was, the last thing he wanted was for some kind of mental breakdown because he'd been concentrating too hard only for the Dursleys to do something stupid.

He had learnt of some of these techniques on Gallifrey during his time at the Academy before he'd picked up a few things on his travels, like when he had visited Tibet and several other worlds where the inhabitants were more fascinated with the mind than with anything else.

He had discovered a presence in his mind, something unlike anything he'd encountered in his lives. Time Lord minds were highly protected. It would take a being of incredible power to break through those defences, which was why Sutekh had gotten through. Harry had only discovered this weaker presence when he had been going through what he had learnt about this new universe; while there were some differences to the history he had known when the Time Lords had kept their eyes on the universe, they were subtle.

But as he'd been thinking about it, Harry had felt something was…off. He had felt impressions of it before, but he had just assumed it was the weight of a Time Lord mind inhabiting a human body that still had enough Time Lord in it to stop it from burning out. But whatever the presence was, now he knew about it, it was trying to struggle. If he had his full Time Lord body and mind, then the Doctor knew he could expel the presence while keeping his mind safe, while he repaired the damage, but in his current state, there wasn't much he could do. Nothing except keep holding the presence back.

But now he was going to confront it. He had made up his mind, especially since he knew it was sentient, self-aware. His curiosity had not ended with the loss of Gallifrey.

As he entered the meditation trance, taking deep breaths (how the hell did humans cope with one heart?) Harry closed his eyes and concentrated, already setting up the meeting place and his precautions although there were a lot of things he was not taking into account…

Xxxx

He found himself in a replica of Gallifrey, and he cursed himself for even thinking of using this place. He didn't think he could ever get over the loss of his homeworld, and thinking of it was painful.

He was not alone.

The tall figure of a human with a snake-like face drew closer, gazing at him in astonishment. "How are you here, Potter?" The figure said in a snake-like voice.

Harry lifted a brow, surprised that this thing seemed to think he was incapable of doing this, although from a certain point of view imagined he had every right to be surprised.

"No, let me guess. You're the thing that attacked the Potters. Oh yes, I have enough understanding of the war, and I remember that night," Harry replied.

The figure looked around in surprise. "What is this place?"

Harry saw nothing wrong with telling him the truth. "First, tell me your name and I'll tell you."

"I am Lord Voldemort. Now tell me where we are!"

Harry ignored the threatening and demanding tone. "Voldemort? Voldemort. That means flight from death in French. Not very imaginative are you, but I suppose there's a reason for that, and since you're here in my mind, I take it you have tried to live up to your nickname?"

"It's not a nickname!"

Harry laughed even though he was stunned by how oppressive Voldemort's presence was even now, while he used his Time Lord intellect to go over the man's name. There was something…unusual about it. But he decided to shelve it until he went over it. There was something about that name.

"What are you laughing at?"

"Oh nothing, I was just wondering how you feel about being trapped in a half-alien's mind?" All humour left Harry as he glared at Voldemort. "You might think you're smart, but at the end of the day, you're still nothing more than an uninvited house guest. You made a big mistake, because when I get my body back, my full body, you're going to learn to regret it. And there's no point trying to fight me off. I don't try to underestimate my enemies that much, but you are wasting your time trying to wrestle control of my body from me."

It might be a mistake warning him of this, but he was getting tired of the presence of this thing in his head.

"Your full body?" Voldemort repeated.

"I'm not human, you stupid, stunted little monkey," Harry spat; feeling all of the rage and self-loathing he felt towards himself for being so stupid for giving Faction Paradox the means to pervert his own history, and weakening Gallifrey's own defences until there was nothing left to save. "Congratulations, you picked a fight with an alien with the power to hold you in here indefinitely."

The moment he said that Harry instantly regretted it, but there was nothing he could do about it now because it was largely true. He could keep whatever this was contained in his mind, all he had to do was make sure this shade of Voldemort was relegated to the worst places that he had visited in the TARDIS as the Doctor.

"An alien?" Voldemort repeated.

"Yes, you know, Little Green Men with pointed heads, only this alien is perhaps the most dangerous thing you've ever seen," Harry said darkly.

"Aliens don't exist-!" Voldemort denied although he looked unnerved.

"Really?" Harry snapped, and Voldemort was swept up in memories of the things Harry had seen; Voldemort found himself in the middle of a war zone being attacked by pepper pot-shaped metal creatures that chanted, "EXTERMINATE!"

….Then he found himself drowning in the ocean depths, surrounded by strange creatures which looked like humanoid turtles, but he knew they were like no other magical creatures….

…he was running across what looked like moorland, the roars of some giant animal with black scales covering its body, bellowing in his ears.

"I am a complex space-time event," Harry's voice filled the Horcrux's consciousness, "I was Lord President of Gallifrey. I am the Sandman. I am the Ka Faraq Gatri. I am the Destroyer of Worlds!" To emphasise his point, Voldemort found himself floating in space, screaming in the silent void, watching as a sun in an unknown solar system was destroyed. "I am the Oncoming Storm. ….sometimes I am your worst nightmare, but I plan to make sure it happens to you, Tom Marvolo Riddle; don't be so stunned. Your mind is so pathetically easy to read even if it's quartered into bits I tore through your past. I've met power-mad would-be gods before. I am the Doctor, and one day you will regret even going to the magical world."

Harry - the Doctor's words - echoed throughout the Horcrux's mind, and the piece of Lord Voldemort realised it was scared.