Prompt from aMiserable_creature on Reddit:

The Order of Phoenix needs someone with the knowledge of how to defeat Voldemort. They have someone with the power(the BWL), but they don't know how the power works.

So, they do the ritual, and boom! You(or an OC-SI), the unsuspecting potterhead immediately are confused and realize what has happened(through the power of reading Summoning fanfics)

They are all shocked that it's just some common muggle? They were expecting a Harry(the BWL) or Hermione from another world to come and explain to them. But they used the word knowledge, not power, or someone that has already done the duty of defeating Voldemort once. How would a ordinary muggle know the dark secrets of He-Who-Must-Not-Be-Named?

You immediately explain the Harry Potter book series to them, and they are all confounded. Someone knows all of Harry from a different world's thoughts? What?! Dumbledore is gay?

Bonus for explaining fanfiction-Imagine Harry's thought at fanfictions where he kills everybody or is Peverell-Gryffindor-Melin-etc-etc-etc-etc-ROYG-Black-Violet.

Dumbledore would not be aware of the horcruxes(or at least how many, or something crucial). He might not even know that TMR JR is Voldemort, or other crucial things like the prophecy, etc (I would like for the SI to tell him something that he knew in the books that's important that he wouldn't know in this world)

It would be interesting if it was an AU world, or even a popular fanfiction-verse. Imagine being summoned into Seventh Horcrux or HPMOR! It would also be interesting if it had a severe bashing for one of the characters, or even a WBWL-verse where you recognize the trope and immediately state that the other Potter boy is the true BWL.

Something funny would also be appreciated, it doesn't really have to be serious, although that would be appreciated.

You called for me?

I stumbled and almost fell, disorientation sending my vision swimming. My kindle tumbled from my hand at the jostle, and my jacket slipped out from under my arm as I lunged to catch the device. I missed, and the disorientation was severe enough that I sat down hard.

I scrambled for my kindle, hoping its case had protected it, but the screen had gone dark and blank. I pressed the power button, but it didn't turn on.

"Oh, no!" I exclaimed aloud, then scolded myself at once. "You're going to be late. Get up, you can fix the kindle later."

I gathered my possessions and stood, only then noticing that I stood in the center of a completely unfamiliar field. And I was surrounded by human-shaped heat-shimmers.

"Eep!" I held my kindle to my chest protectively, heart jumping at the sudden revelation.

"Muggle," said a cold voice, disapprovingly.

"Aaaaaaaaaaaah no!" I glanced around desperately for any sign of the road, or my house, or anything remotely familiar. But no, these were not my fields, and there was no road within sight.

I'd read plenty of SI stories of course, written one myself even. Well, started one. Me and finishing things never got along the greatest, but I was working on it.

"Whoever you are, please send me back. I'm going to be late for work."

"Albus. . ." growled the same voice, sounding distinctly annoyed now.

"Patience, Severus," said a calmer voice.

One of the shimmers coalesced. It was, of course, Albus Dumbledore. He looked as wise and elderly as described, though a bit less mad and a bit more worn than I'd personally envisioned.

"Who are you?"

"You can call me A.V." I certainly wasn't going to give out my name to anyone, not in these suspicious circumstances.

Dumbledore looked around the circle, a slight frown on his face.

"Who were you trying to summon?" I asked. "Because, clearly, it didn't work if you got me instead."

"We sought any with the knowledge necessary to defeat the Dark Lord," answered Severus. I'd always thought him a great character, but there was something extremely unsettling about his voice in person. I could well imagine why his students hesitated to cross him.

"Oh, is that all?" I asked. "Well, Voldemort made seven horcruxes—"

Dumbledore breathed in sharply, and I heard similar gasps of surprise from various places around the circle. Fewer than half the assemblage reacted to the word, but more than I'd have expected seemed to recognize it.

"Three were founders' objects, if we're going with traditional canon here. Slytherin's Locket, which is either in a certain cave somewhere his orphanage visited or else in 12 Grimmauld Place if Regulus defected. Ravenclaw's Diadem, which is in the room of Requirement at Hogwarts, and Hufflepuff's Cup in the Lestrange vault at Gringotts."

I paused for breath, and realized I was actually fairly thirsty as well. "I don't suppose I could get a drink?"

Dumbledore silently conjured a crystal glass from the air with the tip of his wand, which filled with water even as it solidified. I accepted it, impressed despite myself. It was the first time seing real honest-to-goodness magic up close and in person, after all.

I drank, then continued. "The others are the Resurrection Stone—" again, Dumbledore reacted, though this time he only blinked. "As well as. . ." I hesitated. "I'm having a hard time remembering, actually. I know that Harry Potter is one."

That elicited gasps from everyone present.

"Oh, right, the snake. Nagini. And the diary, but did you already deal with that?"

I glanced at Dumbledore, but he didn't give any sign of recognition. "Okay, AU then. In that case, my information may be invalid— but no, your spell was supposed to conjure someone who has the knowledge, so it must be at least semi-canon compliant."

I counted on my fingers. "Harry, Snake, ring, cup, locket, tiara. . . Diary. Yep, that's all of them. So, can I go now? I'm really going to be in trouble if I'm not there soon. Recently I've been late too often as it is."

"I'm afraid we cannot reverse the ritual until Voldemort is defeated. Once its purpose is ended, it will invert and send you back to the time and place from which you were taken."

I sighed, half relief, half irritation. I wouldn't necessarily be late, but it also meant I'd be stuck here as long as it took to defeat Voldemort. Arranging all the circumstances of the book exactly would be difficult, if not impossible.

"So, if the diary hasn't been dealt with. . . was the Chamber of Secrets ever opened in the past. . .? What year is it anyway?"

"1995."

I stood straighter. "'95? Umbridge? Is Sirius okay? Is Harry having nightmares? No, of course, Sirius didn't die until the end of the school year, which would be '96."

"Umbridge?" Dumbledore asked, sounding puzzled.

"I'm going to die next year?!" someone else exclaimed. The voice was more cultured than I'd have expected, but then I generally forgot just how British everyone in the HP series really was.

"Perhaps not," I added hastily. "Now that I've given you invaluable strategic information about defeating Voldemort, why don't you tell me what's going on in this particular AU?"

Dumbledore sighed. "I sense no deception nor darkness from her, so you may all reveal yourselves. It seems we will be working together for the foreseeable future, so there is no purpose to attempted deception."

The shimmering figures around me resolved into people. Sirius Black seemed well enough, Severus looked as dour as ever - and twice as intimidating, - Tonks was immediately obvious by her neon green hairstyle, and Arthur and Molly Weasley by their red. I didn't immediately recognize the seventh and final figure in the circle, but it must have been a member of the Order since everyone else here was.

"So, how is Harry?"

"Harry is fine," Dumbledore said, but a faint frown creased his forehead at my bringing him up again.

"What is it?"

"It seems we have made a severe tactical error," Snape said with more than a hint of a sneer in his tone. "In our attempts to protect his brother, we failed to take proper precautions with him."

"Brother? Oh, wonderful. Are James and Lily alive?"

"No." Sirius said with some vehemence. "They would never have allowed anything like this travesty to have taken place."

"The prophecy spoke of one born as the seventh month dies," said the seventh Order member, in the tone of one repeating himself for the hundredth time. "Oswell was born at the very stroke of midnight. Harry was born several minutes later, Flora several before."

"Wait, three of them?" I asked. "I haven't heard that one before. Usually it's just twins. Or Neville." I made a mental note that, if I ever made it back, I should look for any existing stories involving Potter triplets.

"You come from an alternate reality, then? Not our own future?" Sirius sounded relieved.

"I suppose so," I said. "It's 2018 where I'm from, and it's getting harder and harder for fic writers to imagine what the nineties were like. I mean, I lived through the whole decade myself, but time makes things fuzzy. What was eighties, what was nineties, what was oughts? The twenty-teens are having a personality crisis, though; my goodness. When people look back, they'll wonder what we were collectively thinking."

"I would appreciate it if we stayed remotely on topic?" Severus interjected before my rambling could continue.

"Right, right." I said. "Where were we?"

"You asked after Harry and said he was a horcrux of the Dark Lord," Severus supplied.

"Thank you. Yes. Well, where is he?"

"He is the ward of the Malfoy family," said Arthur.

"And are they. . . Dark?" I asked.

"Yes," Severus answered. "Unflinchingly."

"I should never have allowed it," Sirius growled, padding back and forth. "It was a stupid compromise. I should have stayed firm."

"It would have only hurt the children in the end," Dumbledore said. "Peace, Sirius. You did your best."

Severus sneered. "Yes, I'm sure you couldn't possibly have been more useful despite your best efforts."

"Severus, Sirius, please," said the last man. "This is hardly the time—"

"No, I'm sick of taking his nonsense," Sirius declared, striding over to face Severus, his hand gripping his wand firmly at his side. "For three years I've had to put up with this, and he only keeps getting worse."

"Please return to your place, Sirius," Dumbledore said mildly. "Your grievances with Severus have no place in this meeting. All will be addressed in due time."

Sirius half raised his wand as though to hex Severus anyway, but Dumledore's words clearly affected him and he scowled, then stuffed his wand angrily into his pocket and stalked back to his place.

"Thank you. Now, A.V., you were asking after the fate of the Potter triplets?"

"Yes. Where are the others? Is Orwill with the Dursleys, I'm assuming?"

"Oswell was indeed placed with his nearest blood relations," Sirius snarled. "Worthless muggles that they are. If I'd known what they were like, I'd never have permitted—"

"It was never your place to permit anything," Molly put in. "Just because you were friends with their father doesn't give you any stronger claim than anyone else."

"And Flora?" I prompted, before the topic could get too far from topic.

"With me," the stranger said. I looked him over more closely. His outfit seemed well-used but far from shabby. Still. . .

"Lupin?" I guessed.

"After Greyback's attack on her sanctuary, it seemed the natural solution."

"So. . . Let me see if I've got this straight. Orwill—"

"Oswell."

"Right, Oswell is the Boy Who Lived, stayed with the Dursleys, and is basically your hero/savior in training?"

General nods.

"Flora is a werewolf, training with Remus, and has no part in the prophecy?"

Again, nods.

"And Harry, who has a very mundane and obviously non-magical scar, has been adopted by the Malfoys?"

"Correct."

"But Harry is Voldemort's horcrux, so having him with a Dark family like the Malfoys will only ingrain and reinforce any Dark inclinations that growing up with direct contact with the Dark Lord's soul might have on him. Is he a Slytherin?"

Nods.

"What about the others?"

"Flora is a Ravenclaw," Lupin said.

"And Orwill is a Gryffindor?" I asked.

"Oswell is a Hufflepuff, actually," Sirius said. "James would have been mortified to find that none of his children followed in his footsteps."

"Well, that's different," I mused aloud. I glanced down at my kindle, the screen still dark and unresponsive. I wished I had my laptop with me, I felt like I needed a spreadsheet or flowchart to map this thing out. And I thought my fanfiction was complicated.

"Unless I'm much mistaken, Harry will be the actual savior of prophecy," I declared. "Either that, or he'll go completely evil and hand the world to Voldemort of his own free will. That sometimes happens too."

"No!" Molly exclaimed, looking aghast. Most of the Order seemed pretty shocked, actually.

"What do you mean, 'that sometimes happens'?" Dumblore asked carefully.

"Well. . ." I hesitated, unsure how to explain. "See, in my home universe, your universe is fictional. And it's not even canonical. I mean, you're obviously living in an AU WBWL fanfiction. And depending on the viewpoint character, Flora may be a Mary Sue who's the actual child of prophecy, or Harry could be any number of alternate selves."

"You do not believe we could possibly have interpreted the signs correctly," Severus noted. "Oswell is assuredly not the proper child the prophecy spoke of?"

"Well, for that I'd have to know what the prophecy said. It varies, though it's usually something along the same lines. The one with the power to vanquish the Dark Lord approaches etcetera etcetera."

"Indeed," Severus said dryly.

"The one with the power to vanquish the dark lord shall come," Dumbledore intoned, "come as the seventh month dies and the fire of defiance is reborn. Those who have thrice refused the call of darkness will thrice be rewarded for their travails. First the star to guide the path, second the fire to light the way, third the lightning to strike true. Through pain and despair a new fire arises. The Dark Lord will fall beneath its flames, and hope reborn shall kindle."

"Wow," I said. "That is different, and also confusing. If the 'first second third' thing refers to the children, isn't it obvious that Harry is meant to defeat Voldemort?"

"Thrice is fire mentioned, and only spoken in reference to the middle child," Dumbledore said. "Also, Oswell was the child born as the seventh month dies."

"You put too much faith in prophecy, and not enough in good sense," Arthur said. "I've said it before, Dumbledore, we should never have let them be separated."

"The only way to convince the Ministry to allow a werewolf custody of Flora was to concede to Malfoy's demands," Remus said wearily. "He could have locked us in pointless bureaucracy for years had we continued to defy his request. And without me to help her, I shudder to imagine what could have happened to her."

"Third the lightning to strike true," I said quietly. "If this were a standard Canon-Compliant fic, my job would be done already. But if things are so significantly AU. . . Harry is the lightning. It could never be anything else. But where will he strike true?"

I was beginning to feel distinctly uneasy.

Author's Notes:

Yes, I know I have plenty of stories already underway. This will be short, and not high priority at all. Since finishing Fall With Me last week I've had a hard time switching from KotOR mindset back to HP, so when I saw this prompt on the HPfanfiction reddit it seemed as good a place to start getting back into the HP side of things as any. I'm trying to regain the thread of Shadow of the Past so I can post a new chapter (or at least semi-chapter) of that tomorrow, but I can make no promises.