INTO THE PAST.
Before the beginning of his Sixth year, Harry creates a spell to take him back in time, transporting himself into the body of his 13 year old self.
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Tempus Porta - translates as 'Time Gate'.
PROLOGUE.
Harry stood in front of bedroom window, staring out at the darkening street. The misty fog his breath had left on the window sparkled in the orange glare of the streetlamp outside, and the artificial light drained his face of all color, so that he looked ghostly beneath his shock of untidy black hair.
It was time.
Since the start of the summer holidays, he had been crafting the spell. Of cause there had been no possible way he could test it, he only had one chance. All he could do, was hope nothing went wrong.
Harry took a deep breath, and held his wand out before him, his voice soft as he spoke the spell he had created, "Tempus Porta."
A large, shimmering silver 'mist' shot from his wand, forming into a swirling vortex in front of him. Licking his lips, Harry took another deep breath, concentrating on the exact place in his past he wanted to go to, and stepped into the silver vortex.
It felt like he was being ripped apart, like he was being pulled in every direction, and crushed until he couldn't breathe. His eyes were squeezed shut from the sheer force of the vortex, his chest ached and his lungs burned as he fought to remain conscious...
And then it was over, cold air filling his lungs as he gasped for breath. As he opened his eyes, he saw Sirius watching him in his Animagus form - just as he had the last time, except this time Harry wasn't afraid of him.
Grinning Harry stepped towards him, "Hi Sirius."
Sirius transformed in an instant, frowning as he walked towards him. "You remember me?"
"It's a little more complicated than that," Harry said as he strode forward to hug his Godfather, smiling as Sirius returned his hug.
As he pulled away, Sirius looked at him in confusion. "I would have thought you'd be afraid of me."
"I was," Harry said quietly, "the first time I lived through this."
Sirius frowned, "what do you mean, 'the first time'?"
"I'm_" Harry hissed in a breath as his head suddenly seared with a sharp pain, gasping as he doubled over, Harry silently cursed himself for not considering the possibility of side effects from his spell.
"Harry!"
He barely heard Sirius, as he swayed on his feet, Harry felt his Godfather's hands grip his shoulders, holding him upright.
"Harry?" Sirius' voice was filled with concern as he held him, "Harry? What's wrong?"
Panting, Harry closed his eyes, sighing with relief as the pain faded to a dull throb. Straightening, he managed a small smile. "I'm ok." He was now anyway, there was no way of knowing if he would have more headaches like that, or if it was a one time event.
Sirius shook his head, his face filled with concern and worry. "That was not 'ok'_"
Shaking his head, Harry sighed. "It was a side effect from the spell I used to bring me here," he explained.
Sirius frowned, "What are you talking about, Harry?"
Taking a deep breath, Harry shrugged, "I'm from the future," he explained, "I invented a spell to take me back in time to this exact point in my past."