The two forces that should have never met will cross paths in the space-time hole

Beware, they will destroy

EVERYTHING

Hogwarts, 2nd May 1998

The Dark Lord Voldemort and his army stood before the fortified castle Hogwarts. This was it, this was the final fight. No matter who won, it would end today.

"Began" ordered Voldemort with a gentle but powerful breath. The dark wizards behind him raised their wands and started shooting shield breaking spells towards the castle.

Under the light of the almost full-moon, the white wisps of magic sailed to the shield spell protecting Hogwarts. Then they impacted and bright white lightning flooded the landscape of northern scotland.

And then came absolute darkness.

In less than a second, pitch black clouds flooded the sky, just when the second volley of shield breakers impacted into the shield. The magic blast cleared the sky, at least that's what the magicals thought.

The sky was still black, but now red and blue lights flickered across the black firmament.

"My Lord" said Lucius Malfoy "What is going on?"

"I confess that I do not know Lucius, but no matter what is going on, we will continue. FORWARD!" shouted Voldemort to the cheers of his followers.

And then came the disaster.

A giant explosion illuminated the sky and two titanic figures fell down.

One crashed into the shield surrounding Hogwarts, the other collapsed just in front of the Dark Lord.

Carefully, Voldemort vanished the dust that surrounded the impact zone and it revealed a giant, four legged beast. Its body was mostly dark blue, with some lighter coloured lines across the legs and the long neck and numerous steel grey highlights and horns. In the centre of its chest was a glowing blue diamond.

The beast that crashed into the shields was bipedal, its body mostly white and dark grey, with dark purple lines all over the muscular body. It had two wings that could split into three pieces each, and a glowing white pearl on each shoulder.

Both monsters looked like dragons, but just way stronger. They emitted pure power that was not from this world.

"What is that?" asked Bellatrix in shock.

"I do not know but it doesn't matter. I will control them. IMPERIO!" roared Voldemort and fired the unforgivable with the all-mighty Elder-Wand at the blue creature.

Like that, Voldemort gained access to the creature's mind. He suddenly felt as old as time itself and as young as a raindrop. Ancient and new.

He had no chance to control the mind of whatever this was. The creature just roared loudly and seemed to focus. The blue lines on its body glowed and a sphere of energy formed over its head. The monster shot his head forward and fired dozens of glowing balls out of the sphere.

The pink being spread its wings and evaded the spheres, they crashed into the shield of Hogwarts and obliterated it.

The now airborne monster roared and glowed as well. A bright pink sphere formed between its hands which it then threw towards the one in front of Voldemort. But it also moved out of the way and the pink sphere crashed into the ground behind the Dark Lord, killing dozens of his followers.

Voldemort watched in morbid fascination how the two titans fought.

Meanwhile, in Hogwarts

Harry shared the fascination. With just one attack, the blue dragon destroyed the shields that took twenty adults and experienced wizards an hour to build.

"What are these things?" asked Ron, only now truly scared for his life.

"I-I don't know Ron. But whatever they are, they aren't on our side" replied Hermione.

"Might be, but they are also not on Tom's side" continued Harry.

The three best friends watched the battle of the titans from a classroom on the third floor. They could see how the students and adults who wanted to fights against Voldemort were also watching from the yard.

Suddenly, a bright orange beam slammed into the yard, instantly vaporising everyone there.

"NOOOOOOOOO!" screamed Ron with tears in his eyes, nearly his whole family was there. "YOU MONSTER!" he screamed towards the blue monster in the sky.

Suddenly, the door of the classroom flew open and Remus Lupin entered the room. He was panting from all the running he did.

"What are you still doing here? Get out, quick!" he yelled at the teens.

"But Remus, the horcrux" began Harry but the Werewolf interrupted him.

"Forget the horcrux, forget everything except praying to stay alive! COME!" he grabbed Harry and Ron by the wrists and pulled them with him, with Hermione following behind.

"Do you know what these things are Remus?" asked Hermione curiously.

"Gods" replied the man curtly.

"What?" asked Harry shocked.

"These 'things' as you called them, are the gods of space and time. They existed before the universe got born. I only read about them in Legends, I never thought they were real."

"HOW CAN WE KILL THEM?! THEY KILLED MY FAMILY!" screamed Ron enraged.

"And they will kill us next. I don't know why they are here, but there is nothing we can do against them. They stand above such things as death. All we can do is pray for them to leave us alone" urged Remus and so the four fled from Hogwarts.

But it was in vain. The whole area of Hogwarts got transported into a pocket dimension, into the space-time hole. Here the two gods of creation fought their eternal battle.

Palkia, the purple-white one, was the master of space. Its breath stabilises the universe itself.

Dialga, the blue-grey one, was the lord of time. With its heartbeat, the flow of time was regulated.

They didn't realise that there were humans on their battlefield. They never took notice of the building and formations surrounding them. All they saw was their enemy.

After two hours of fighting, most of the wizards and witches in the area were dead. Hogwarts was in ruins, all the Horcruxes were now destroyed. The last ones alive were Harry Potter and Lord Voldemort.

Both were highly injured from debris and rubble and looked at each other.

"Looks like this is the end for us Tom" said Harry and coughed a large amount of blood.

"It seems so Potter. Let me just say, you were a worthy nemesis" admitted Voldemort before he collapsed.

"Likewise" replied Harry.

Palkia's pearls started to glow, and spatial energy collected around its forearm.

Dialga's diamond glowed and the fan on its back grew, while temporal powers flowed to its mighty maw.

Distorted space and warped time collided with each other, and the unimaginable powers of Spacial Rend and Roar of Time destroyed everything in the space-time hole.

The location of Hogwarts, the black lake, the forbidden forest and all the surrounding lands got replaced by nothing. A giant chunk of land was missing, which caused the ocean to claim the new space.

The global sea level sunk by one metre because of that.

The society of magical Britain lost 83% of its population, which rendered their whole government and economy useless.

And that was the end of magical Britain.

The End