Same Changes

Fluffy, asleep.

Devil's Snare, burned.

Winged Key's door, shattered.

Chessboard Room, smashed to pieces, with a certain Weasley Unconscious amongst the rubble... Albus was about to call Fawkes to bring the boy to Pomfrey but quickly realises what day it is, burn day...

Shaking his head, he stabilises the boy with a conversation spell and moves on, finding the troll dead in the next room, and after that Hermione Granger, a friend of both Harry Potter and his student Neville Longbottom shakily sits next to the potion riddle.

"P-Professor! Neville! He went inside, he needs help!" she exclaims upon spotting him, but before Albus can ask why-

"AAAAAAAAAAARRRRGGGGHHHHHH!!!!" a painful scream echoes out from the door behind the magical flames. He recognised them, Neville was in great pain.

Albus runs forward through the flames after snatching up the correct potion and drinking what was left of it. Through the door, he finds who he expected.

"Tom, stop!" he commands with a shout, pointing the Elder Wand at the possessed Quirrel as he cast the torture curse on the poor boy, the same one that'd made his parents permanent residents of Saint Mungos.

Quirrel's head snaps to the Headmaster, first surprised, then confused, then finally a half-look of realisation and resignation manifests. "Ohohoh, very smart boy, very smart." he chuckles quietly to himself, "Well played." he cuts off his spell and turns to face Dumbledore. "At first I thought you had tricked me, Dumbledore, but I know now that is not the case."

"What do you mean, Tom? What are you planning?" Albus asks, spine stiffening at the strange confidence and certainty his opponent was projecting... What did Tom know that he did not?

Quirrel just smiles simply and feints casting a Reducto, only the target wasn't Albus, but the mirror instead. The spell hits and the artifact shatters into a million tiny pieces, much to the shock of the Headmaster.

"N-no! Do you know what you have done!?" Albus exclaims, horrified at the turn of events.

"I do! I know I cannot win this fight, but now neither of us will have the stone! I wonder what your dear master will say now that you have doomed him and his wife! Treat this as the beginning, dear Dumbledore!"

Albus grits his teeth, his many plans for the stone after this had all fallen apart at Voldemort's uncharacteristic actions. He knew the man was spiteful, but enough to deny both of them immortality? He hadn't realized the depths the man's hatred ran. "You-" he starts but pauses as the wards in his office detect an intruder. "You planned this..."

Quirrel crooks a smirk at him, the face on the back of his head finally opening its mouth, "Turn, Quirinus."

"As you want, my Lord." he says, turning and unwrapping his turban, finally revealing the face of Voldemort.

"Tom..."

"Albus." Voldemort rasps, "It seems that a new player has appeared, one not beholden to either of us. But while I am immortal, you will have to face the consequences you have wrought."

Dumbledore glances at Neville who was still writhing on the floor and shakes his head. "You will not win, the magical world will never accept you."

"I know, I learned that when I was placed in Slytherin. But the answer remains the same, now and in the past. Force, and overwhelming strength." Voldemort states, just before he raises Quirrel's wand and fires off a killing curse, even with how awkward holding his weapon backwards was.

Albus easily blocks it by raising the stone floor to take the hit, then transfiguring what remained into three large stone lions that unleash alarming roars.

The three stone constructs charge the dark wizard, but he blasts them apart by shouting "Fulgur Percutiens!" unleashing a bolt of lightning that zips between the transfigured creatures and then at Dumbledore, who blocks it with a magical shield.

Voldemort is about to continue when he notices the cracks and blackened skin forming along his possessed body's arm. "Ahm... It appears this body is too weak to endure my true power..." he turns a baleful glare at Dumbledore, "PESTIS INCENDI-" he starts the chant for Fiendfyre in an attempt to kill everyone, but isn't able to as a metal spike shoots through his neck, decapitating him.

Volemort's spirit escapes from Quirrel's headless body and lets out an unearthly screech before finally disappearing, Dumbledore's wards doing nothing to trap him.

...

Dumbledore lets out a tired sigh and hurriedly scoops Neville up with a levitation charm. He leaves the boy with Hermione and commands her to bring Pomfrey to aid the injured while rushing off to his office to apprehend whoever was encroaching on his territory.

-----------------

"N-NO!" Dumbledore shouts as the gargoyle gives way and reveals his quarters, all of which were now burning with such gusto that he wouldn't be surprised if Fiendfyre had been cast there. "EXSTINGUERE!" he roars with his full power, instantly extinguishing the blazing fires... Only, there was nothing left to save...

The many artifacts he'd collected throughout his life, the desk, headmaster portraits, and other inheritance left for the school, even the last portrait he had of his dearly departed sister had been turned to ash.

By Merlin! His expanded trunk that held much of his riches had been destroyed or stolen too! he guessed and hoped it was the latter given how destructive spacial charms could be when disturbed. Not only that, Fawkes was missing too... Fire could not harm a phoenix, but the intruder must have kidnapped him while he was recovering from his burning day.

"Everything is gone... Everything..." he transfigures a chair from the ashes and drops into it with, hopelessness, despair, and anger digging into his soul. Tom had known of this, he had distracted him and allowed the 'new player' to strike at him where it hurt most.

With the stone gone, his titles and positions in stripped from him, most of his riches stolen, and everything he treasured ashes, he wasn't quite sure what to do now... His plans, while still theoretically achievable, were looking all the more difficult by the year.