Disclaimer: I don't own anything of this story. All the characters and the world they live in belong to J.K. Rowling and any company that has a claim to the Harry Potter Trademark. I make no money out of this story. Please don't sue me!

Explanations

As the silvery tendrils of the pensive slipped away, Harry and Albus found themselves back in their seats. The air seemed thicker somehow, weighed down by the heavy silence that pervaded the room. Harry closed his eyes momentarily, trying to shield himself from the onslaught of emotions that revisiting such painful memories had evoked. His heart felt as if it were encased in ice, the chill seeping into every corner of his soul.

It was an odd sensation, like walking through a graveyard filled with the ghosts of his past. Each memory was a gravestone, marking the moments that had stolen pieces of him away – the loss of his friends, the relentless battles, and the ever-present weight of responsibility on his shoulders. It was a visceral reminder of the scars he carried within, tattered fragments of an arduous life.

"Albus," Harry began, his voice barely a whisper. He opened his eyes and glanced over at the older wizard, searching for some hint of what was going through his mind. Albus's face was unreadable, a mask of contemplation that betrayed nothing. Harry felt the cold knot in his chest twist tighter, his sadness morphing into trepidation.

Had he managed to convince Albus to help him? Or was the headmaster considering the unthinkable: obliviating both of them to remove any knowledge of the future? The thought sent a shiver down Harry's spine, leaving him feeling more exposed than ever before.

"Harry," Albus finally said, his voice gentle but laced with concern. "I cannot claim to truly understand the depth of your pain, but I can see the toll it has taken on you."

A flicker of emotion crossed Albus's face, and for a moment, Harry caught a glimpse of the caring mentor he had known in his youth. But just as quickly as it appeared, the ghost of his past vanished, replaced once more by the inscrutable visage of the present.

Harry stared at Albus, his eyes pleading for understanding, for the hope that had been so elusive in his life. The room seemed to hold its breath, as if waiting for the headmaster's response.

The silence was suffocating, permeating every nook and cranny of Dumbledore's office. Harry shifted in his chair, unease gnawing at his insides like a famished Niffler. He felt vulnerable after sharing those memories, exposing the raw, jagged edges of his soul to the headmaster.

"In the last memory we witnessed, my office appeared... changed, ravaged by time. How much time had lapsed between the Battle of Hogwarts and that moment?" Albus finally said.

Harry looked down at his hands, empty of the scars and calluses product of the war to come. He hesitated before replying, "I'm not entirely sure."

"Please, elaborate," Albus urged gently.

Taking a deep breath, Harry began to recount the events following the battle. "After you... well, after you absorbed all the magic left in the castle and caused that explosion, Voldemort's forces were momentarily weakened. Tom's body was destroyed, but it didn't take long for him to find a new one and regroup with his followers."

"And you?" Albus prompted, his gaze never wavering from Harry's face.

"Everyone thought I was dead, or at least no longer a threat," Harry admitted. "That gave me some breathing room, some time to grieve and try to come to terms with everything that had happened."

"A fortuitous reprieve, despite the situation," Albus murmured, his expression sympathetic yet still tinged with curiosity. "But what brought you to that moment in my office? How did you go from grieving to... wherever you ended up?"

"Albus," Harry began, hesitatingly, "I may not have died that night, but a part of me did. The part that matters." He looked down, his knuckles turning white as he clenched his fists. "Afterwards, I was just... a husk filled with burning anger. All I wanted to do, all I could do, was track and kill Death Eaters."

"Harry," Albus whispered, his sadness was palpable.

Harry sighed. He paused for a moment before continuing, "In order not to lose the advantage of my presumed death, I created a new persona for myself –" he paused, swallowing hard, "– The Grim."

Albus stayed silent, encouraging Harry to elaborate.

"My days were consumed by training, planning attacks, and executing them." Harry continued, "I wasn't really alive, but I wasn't dead either. My mind was locked away somewhere, and I became a spectator of my own actions. It was like watching a tragedy in which I played the lead."

"Harry, my boy," Albus murmured. He started reaching with his hand across the desk, but stopped in the middle, "I cannot fathom the depths of the darkness you were treading at that time. The pain must have been unbearable."

"Unbearable doesn't begin to cover it," Harry replied, his voice wavering. "The worst part is, I didn't even care if I lived or died. I was simply going through the motions."

"Yet here you are now, Harry," Albus said gently, his eyes twinkling despite the gravity of their conversation. "You found your way back. You fought the darkness and emerged victorious. That takes a strength of character few possess."

The fire crackled in the grate, casting a warm glow over the room as Harry traced the patterns on the armrest of his chair. He remembered the countless hours he'd spent training tirelessly, honing his skills to become The Grim – a persona born from pain and hate.

"As The Grim, I dedicated myself to becoming more powerful. With each new spell I learned, each new technique I mastered, my hunger for revenge seemed to grow." Harry continued, his voice low and steady despite the memories swirling through his mind.

"Such is often the path of darkness, Harry," Albus replied solemnly. "Power begets power; it will consume you if you let it."

Harry's eyes flickered towards the headmaster, acknowledging the truth in his words. "I became better at tracking down Death Eaters, taking them out one by one. My hits grew bigger, more daring, leaving a trail of destruction in my wake."

He paused, taking a deep breath as if to rid himself of the lingering shadows from that dark time. "I don't know exactly how long it lasted, but it couldn't have been more than a couple of years." His gaze dropped to the floor, the weight of his past actions settling heavily on his shoulders. "If not for... I would've kept going until Voldemort was dead... or, more likely, I was."

"Your strength and resilience are remarkable, Harry," Albus said gently, leaning forward in his chair. "But tell me, what was this catalyst that brought you back to the light?"

"I had just cleared Parkinson Mannor, taking down sixteen Death Eaters, including one of Tom's generals. I was looking for food to bring back here when I found it, a book" Harry explained, his eyes far away as if reliving his steps "The Hermione within me must have woken up first, because for some reason I grabbed it and brought it back with me."

Albus regarded Harry with curiosity. "A book you say?" he asked.

Harry shrugged, unable to explain his sudden interest. "I don't know why, but something about it just called to me. The book was 'A Comprehensive Theorem Of Temporal Manipulation' by Quentin Bower."

"Ah, yes," Albus mused, stroking his beard thoughtfully. "I believe I own a copy of that very tome."

"You do," Harry confirmed, "It should be in one of the chests in your chambers"

"I see you are acquainted with my library," Albus said amused, "I must say I am surprised you found any value in that book. I seem to remember Bower's thesis to be questionable, at the least"

"The book is utter rubbish. Nothing inside it is accurate," Harry explained, his voice tinged with both frustration and amusement. "Which is astounding for a book over 450 pages long. But the contents weren't important. It was what the book did to me that mattered."

"Finding that book... it woke up something inside me," Harry continued, the pivotal moment fresh in his mind, as if it had happened only moments before. "Maybe it was the 'Hermione' in me, or maybe I was just clinging to the last shreds of hope that I refused to acknowledge until then. But that book, despite being complete nonsense, reignited that hope within me."

"Interesting," Albus mused, his fingers tapping together thoughtfully. "And how did this newfound hope manifest itself?"

"Books," Harry replied with a wry grin. "I suddenly had a thirst for anything with the word 'time' in it. I devoured every book on the subject I could find in your library, even the ones hidden in the secret compartment behind your bed."

"Ah," Albus chuckled, "I see no stone was left unturned."

"Yeah," Harry replied, smirking. "And so, I started designing the ritual that would eventually bring me here"

"Remarkable, Harry," Albus said, eyes twinkling. "The fact that you were able to devise such a plan is truly astounding."

Harry gave a self-deprecating snort. "To be honest, if I'd known anything about runes or arithmancy, I probably would've dismissed the idea as pure lunacy from the start. It was only my ignorance that allowed me to even entertain the notion."

"And perhaps a touch of madness?" Dumbledore suggested gently.

"Definitely," Harry agreed, rubbing the back of his neck sheepishly. "But once I had the idea in my head, I couldn't let it go. I stopped my attacks, and instead started hitting the Death Eaters' libraries. I studied every book on runes and arithmancy I could find, trying to figure out how to make the time travel ritual work."

"Remarkable," Albus said, nodding sagely.

"Hardly," Harry replied with a hint of frustration. "I wasn't making much progress. I mean, Hermione could've probably done it on her own, but I'm nowhere near as smart as she is. And everyone else who might've been able to help was... well, dead."

"Quite the predicament," Dumbledore murmured sympathetically. "So, what did you do?"

"Something drastic," Harry answered, his eyes darkening with the recollection of his feelings at the time. "I decided to speak to the dead."

With a wry smile, Albus remarked, "I do hope you're referring to my portrait and not dabbling in the dark arts of necromancy, Harry."

Harry chuckled at the headmaster's jest, but his face soon grew sombre. "To be honest, I did consider it for a moment," he admitted.

"Truly?" Dumbledore's eyes widened in surprise, as if he was seeing a different side of the young man before him.

"Back then, I was still angry at you," Harry continued, looking intently at the old wizard. "When you sacrificed yourself at the Battle of Hogwarts, you denied me my right to die alongside you, as I was supposed to."

Feeling the weight of Harry's accusation, Dumbledore opened his mouth to defend himself, but Harry cut him off. "It's alright, Albus. You don't need to explain yourself. The you sitting here didn't make that decision, and even if you had, I've long since learned to forgive you for it."

Dumbledore regarded him with relief before Harry went on. "So, instead of necromancy, I decided to fetch your portrait from the storage room in the office."

As he recounted the tale, Harry could almost feel the cold, dusty air of the storage room, the numerous portraits of past staff pilling in a corner. With a heavy heart, he had activated the portrait of Albus Dumbledore, the man who had been both his mentor and his friend.

"It took me a long time to explain everything to your portrait - my plan, the memories, all of it," Harry told Albus, an undercurrent of exhaustion evident in his voice. "But eventually we arrived at the memory you witnessed and he agreed to help me."

Albus, his eyes distant and thoughtful, kept stroking his beard as he mulled over Harry's tale. The room seemed to hold its breath, as if it too was waiting for the headmaster's response.

"Harry," Albus began, "I must say that your story is quite the fascinating chronicle. But I have to ask - if you had indeed become as powerful as you claim, why not simply seek out and defeat Voldemort? Surely that would have been simpler than concocting a ritual to travel back through time."

Harry shifted uncomfortably in his seat, feeling the weight of Albus's question. He knew that the headmaster had a point, but there was more to the story.

"By that time, Tom had caught wind that some of his Horcruxes had been destroyed," Harry admitted. "He'd created new ones, hid them even better than before. Finding and destroying those Horcruxes would have been...nigh impossible."

A stunned silence fell upon the room. Dumbledore's eyes widened, his gaze piercing as he regarded Harry with disbelief. "Horcruxes, you say? Plural?" He paused briefly, absorbing the revelation. "I suspected Tom had created one of those despicable objects. Yet you speak of multiple Horcruxes, Harry?"

A wry smile tugged at the corner of Harry's lips. Despite the gravity of the situation, it was difficult not to find a bit of dark humour in it all. "Oh yes, Tom had quite the collection."

Harry watched Albus Dumbledore pale as he said "I mean, why have one when you can have seven?"