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Dumbledore was feeling happier than he had in years. Even if his plan to have Harry die so he could become the 'defeater' of another dark Lord had fallen apart, he was about to salvage a lot of 'Greater Good' out of it … greater good for Albus Dumbledore.
The three principle architects of the downfall of Thomas Riddle Jr. had been ruled "too dangerous" by his carefully manipulated Wizengamot and were in magic suppression handcuffs, about to be eliminated, all for the greater good you understand.
The scene was set in the midst of Diagon Alley, right in front of the Daily Prophet building. Standing there, manacled, were Harry Potter, Hermione Granger, and Neville Longbottom. Bound by magic suppressing handcuffs. Several Dementors were in a ward constructed "holding pen" for the moment.
Most of the 'Mot members were present to watch their orders carried out. A few, ashamed of this travesty, had absented themselves.
Suddenly there was an unscheduled "Pop-pop-pop" and a rather large man and two small children, no larger than house elves, stood there, dressed entirely muggle, if a little strangely.
The man was apparently chatting on a 'phone' of some kind, working in spite of the high magic area. The children were grinning ear to ear, as if they knew they were about to be unleashed, to work all kinds of mischief.
Dumby immediately tried to summon the phone-thingy using the elder wand. This had "unfortunate consequences". First it did not summon, and second, a reflected spell of some kind caused the wand to detonate in his hand, destroying most of its tissues, and cauterizing the wounds.
The muggle man smiled, and said into the phone "I'll get back to you" and he put it away in his pocket.
A number of spells were sent in his direction from various wizards and witches, with results similar to Dumby's. A lot of maimed magic users, who could not be repaired by the best St. Mungos had to offer.
A look of extreme loathing crossed the man's face, as he studied Dumbledore.
"Ahh, the great wizard, a legend in his own mind." was what he said.
"I'm here to stop you from destroying all the magical cultures in the world through your hubris, combined with blind stupidity. Yes, me, how ironic. Dudley Dursley."
Various jaws dropped, not only the one belonging to Albus.
"You see, it turns out I am not a muggle, but a … squid?"
"So when I married a high functioning witch, we had these tykes here. Archmages both of them … and techno-archmages at that. Born into a world where the magical society had been reduced to rubble … by YOU, Dumb-as-a-door."
Someone tried to release the Dementors from their cage, but one of the children made a hand gesture, and all of them exploded into an oily, grimy mess, into which their robes dropped.
"Now that wasn't very nice of you," the other child spoke for the first time, cutting through the shocked silence.
Suddenly real fear penetrated the insular wizarding minds, which had somehow ignored the destruction of wands, and the hands that held them, yet found the destruction of the demons unfathomable.
"Daniel, why don't you release our friends from those stupid bracelets these folks think so highly of."
The boy of the two children sauntered over to where the 'heros of the war' were being held and with his index finger tapped each of the sets of handcuffs.
With each tap he muttered something that sounded like "Unbind quarks", and the metal manacles vanished, like dry ice on hot pavement.
"You see, Dumb-as-a-door, and the rest of you fools, we have so far surpassed you that you are helpless against us, for all your so highly thought of "magic"."
"We are immune to your tricks, but you are NOT immune to ours."
"Now I'm not able to give you details, I don't have a PhD in particle physics, but it goes something like this. Once we found the Higgs Boson, it became possible to study the Higgs Field. And guess where your "magic" operates? So now your 'magic' is just a bit more science to us. And guess what, you folks are so benighted, two centuries out of date mostly, that you have no chance of prevailing against us."
"Hermione, Harry, Neville, come over here and take one of my children's hands."
They did so and "Poppop" they were gone.
With a sudden "Poppoppoppop …" a squad of Her Majesty's Magical Guards arrived, to round up the insurrectionist magical government of Britain.
"I'd tell you to 'have a good day', Dumb-as-a-door, but I know it won't be. After your trial, the Queen has had the old, retired, block retrieved from storage, deep in the Tower of London, and returned to Tower Green, and you will have the unique privilege of having your head, but not those god-awful robes, displayed where those who chose treason always ended up, back in the times you so worship."
OMAKE by TomHRichardson:
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After Dumbledore and the other treasonous wizards (and witches) had all been arrested and taken away, newly-freed Hermione walked up to Dudley and said, "Please, before you three travelled from the future, did you put any future Physics textbooks in your pockets?"