Disclaimer: Listen well and listen all, I own Jackshit. Meaning no property of J.K. Rowlings, various publishers including but not limited to Bloomsbury Books, Scholastic Books and Raincoat Books or Warner Bros. Inc. No money is being made and no copyright or trademark infringement is intended. I do not own Fate/Stay Night or High school DxD, just the original concepts and plot in this story. This Crossover is a complete AU

Summary: No matter what he does, no matter what universe he is in, Shirou Emiya has always and will always give everything he has to protect his loved ones. Even if it means taking up the life that he gave up in his previous life. BAMF Shirou

Chapter 21: Destruction

"I can barely track them!" Xenovia barely managed to gasp out. The force from the clash of swords were nothing more than flashes but the sheer strength was suffocating.

"How can even humans hope to stand a chance against a Devil like that?!" Irina asked.

"Irina is right." Griselda thought." How CAN a human hope to fight against a Devil like that?"

Her eyes didn't even falter for a second from the relatively stable head of the Einzbern heir.

"They honestly don't expect a recruitment to be possible, do they?" Okita asked out loud.

To Shirou, it was a relatively transparent ploy to gain some breath. Nevertheless, he glanced at the heiress of the Gremory and Sitri family.

That was one problem solved.

Off course it opened another.

"What the hell is that blade, anyway?" Okita asked and as if to make a point, held up his blade. Made of pure mithril, it should be virtually indestructible.

The newly forming cracks however begged to differ.

Shirou's blade Sora however was unchanged. It was still chipped but no more than it had been at the start.

"You do not honestly expect me to answer that question, do you?" Shirou replied. What was he, a bond villain?

"Well a man has gotta try."

"That he has." Shirou acquiesced before breathing deeply. He hadn't been wasting his time talking either. Hyperoxygenation of his blood for a strenuous if quick finisher.

His grey eyes took a reddish tint.

An image came in his mind of a purple haired Irishman named Fergus.

Caladbolg

The gears in his reality marble faded away till all that remained was the sword in his hand and the sword in his mind.

This was the reason why perhaps Sora was so dangerous. As his anchor, the sword allowed him to focus without losing his perspective amongst a wasteland of unlimited blades.

Sora could adapt into any of his blades and the associated skill instantly. There were obvious degradations in damage output due to no actual physical manifestation but the near instantaneous change would throw off even a legendary swordsman.

This was the reason why the defences of the Ultimate Devil had been breached so easily. The moment Shirou had shifted from the powerful but rigid English knight sword style to a more flowing Japanese style instantaneously, he had thrown his enemy enough to neatly bisect his left pectoral.

And as the blood loss continued, what had been a fairly even match was shifting more and more into Shirou's favour.

But at the rate of blood loss and given Devil physiology, they would be standing here waving their sticks around long enough to make a mess of his time table.

So Shirou kicked it up a notch.

"Take this as a final gift for a match fought well." Shirou intoned.

"DON'T DO IT EMIYA!" Griselda screamed just as the killing intent hit them.

DEATH, BLOOD, MURDER, DEATH!

Images too gristly to described flashed before their eye as the palpable feeling of murder hung in air, swerving like waves of the great ocean.

Okita panicked for the first time in what had been decades, settled into a completely defensive stance.

Shirou still metres away took a position similar to an archer rather than a swordsman.

He breathed in.

He breathed out.

And stuck in the instant of transition.

To describe the physical process would be easy, for it was a mere sword swing but to the viewers, it was so much more.

A shot of ripple in the space-time itself rushed at the devil.

And his defences failed.

It was an admirable defence of a million strikes, each with little if any difference between them but what can a sword strike do when the fabric of space time itself rushed against them.

"My if that isn't impressive." An absolutely humongous power came into existence.

Dark, almost pitch-black wall of near nothing came into existence in front of the space time rupture.

And [Nothing] won.

"You shouldn't have bothered, my King." Okita said.

"Oh, shouldn't have I?" Sirzechs Lucifer asked stepping from shadow looking at a crack in the wall behind his knight.

"He never aimed the attack on my person." Okita motioned at the fact that the crack was aimed at the edges of the wall.

"Oh, then my apologies for interrupting the match." Even as he said those words, there was nothing but cold stone like quality filled with intelligence and malice that looked upon Shirou.

Shirou smiled a smile that didn't quite reach the eyes as he replied," No harm, no foul."

"Is it?" The Devil asked.

"Oh, everything is just fine." Steely eyes met the demonic.

And today the steel prevailed.

On his way back home, Shirou felt the nudging of great power inside his soul he associated with the great red.

"So, I suppose the experiment was successful." The Great Red asked

"The experiment was successful but the result was a failure." Another avenue blocked.

"The King of Devil is a dangerous one. He knew what you did."

"…I had figured him for more of the King Bael but he does deserve the title of Lucifer, doesn't he?" Shirou asked. Memories of another lifetime in a hell in another world came and left.

"Sirzechs Lucifer sold his sister for peace. Bael never had quite the strength of character unlike Lucifer."

"The question remains if he will share the information with Rias or not."

"I would go with a no. Rias is all power but lacks both the theoretical background and street smart to handle the information."

"She is a dull one, isn't she?"

The Americans had quite a word for it, if he remembered correctly from his trip to Texas.

Bimbo, yes, the word very accurately described Rias Gremory.

Sirzechs poured whiskey into Beelzebub's glass without Ajuka's asking before taking a sip directly from the bottle itself.

Ajuka didn't even notice.

Sirzechs busied himself watching the chipping of the firewood as it burnt to ashes while the other Maou remained entrenched in his thoughts firmly.

"What the hell are the Einzberns planning?!" In frustration, Ajuka crushed the crystal ware in his hand to pieces from excessive straining.

Sirzechs noticed the lack of whiskey in the mess and wondered just how his old friend managed to finish the fiery spirit in such a clandestine manner.

"From what I understand their interest has always been towards the Third Magic, the Heavens Feel but this interest in the power of destruction?" Sirzechs wondered.

"Emiya intentionally provoked you into defending Okita with the space time rupture." Ajuka stated.

"But why?" Lucifer wondered.

Ajuka thought for a while and eventually an idea came.

"It cannot be possible." Eyes widening Ajuka realised something. Sirzechs nudged him to answer.

"What if it was to test if Power of Destruction can destroy the fabric of space time?!"

The power of destruction was a purely offensive ability and even its defence was a wall that destroyed anything bar space time fabric.

Sirzechs snorted.

"Off course it cannot, that is a reign of…." The words trailed off, eyes widening as a hypothesis came too improbable to be true but correct nonetheless. The bottle empty slipped from his nerveless finger.

"The Magic of Destruction, The Fourth Miracle." Ajuka finished

"Imposition of Truth!" Sirzechs whispered sharply.

A brief silence intervened in the room.

"They have to be very close to the Magic itself to be able to theorize about nature of Power of Destruction." Ajuka said.

"Fucking Solomon!" Sirzechs said aloud.

To be fair, Lucifer was justified in a sense. When King Solomon, The King of Magic had died, he had taken down the Secrets of True Magic to his grave, disappointing too many to name.

The Bael had received their share for their loyalty to the Son of David in form of the [Power of Destruction] but it had never been enough.

Even immeasurably weakened, the Power of Destruction was strongest of the magic of devils. Such was its power and yet the Bael family couldn't help but wonder what the True Magic had been like.

And so, the Bael had sought the Fourth Magic for millennia but there had never been quite a genius like Solomon.

"Fucking Serafall!" It was like a series of firecrackers went off in Sirzechs head as pieces made too much sense suddenly.

Ajuka was actually taken aback but a similar line of thought ran in his head soon enough.

"She knew, didn't she? The sudden obsession with Emiya. A True Magic had to be involved." Ajuka said feeling tired all of sudden.

Women were attracted towards power and devils were no exception to that.

Sirzechs snorted and said," And to think I actually believed that story about his gigantic dick and bed skills."

That had Sirzechs actually feeling better.

Off course, Ajuka had to pour water over that, "Well male True Magicians are known to be quite, well, skilled."

Sirzechs motioned him to explain and Ajuka continued," Well Merlin was a half incubus, Zeltretch has banged with nearly every species imaginable and even some that aren't…."

"And King Solomon was well King Solomon." Sirzechs was feeling miserable even before he finished lamely.

"No wonder she stalks him like crazy." Ajuka tried to make light of the situation but it made the ego damage even worse.

Where was the whiskey damnit?!

The stalker in question was actually being stalked herself.

"Okay, come out now." Serafall decided to confront her stalker. She had decided that this particular place was good enough.

Off course all the plans were instantly trashed when the stalker made herself known.

…

…

"Today I shall avenge my Onii-chan!" An angry Illyasviel von Einzbern stepped out of a bush. With magical thunder around her, she cut forth a sight that would send a sane man running.

So Serafall being neither sane nor a man….

"KAWAIIIIIIII!"

"EHH!"

And so Illya ran. She ran faster than Usain Bolt. She ran fast that she broke the sound barrier. She ran so fast that a coyote tried to capture her with an ACME kit but ended up blowing himself.

But in the end, she was captured.

(A few moments later)

"She puts on the dress or she gets spanked again!"

"No anything but the spankings!" Illya was positive she couldn't sit for what seemed like a few years.

Changing into the magical girl clothes, she was expecting a molestation.

But it caught her off guard nonetheless.

"Now just call me Onee-chan" Serafall said, not letting go of the struggling fifteen-year-old in her grasp.

(Event Unlocked: FBI! Upon up motherfucker!)

But that was one thing that Illya wouldn't do. No matter what Serafall did.

"No only Shirou Onii-chan is Onii-chan!" Illya said defiant.

That gave Serafall a pause.

"Shirou as in Shirou Emiya?"

And that gave Illya a pause.

"You know Onii-chan?" A feeling of great unease settled in Illya's stomach.

"Know him? He is my lover!" And didn't saying that made Serafall happy. Illya on the other hand was anything but happy.

"LIAR! Filthy, slutty, lying cunt!" Illya screamed.

For a moment, Serafall was taken aback before she smiled. Illya's pit in stomach seemed to widen.

"He has a dark circular birthmark on his right buttcheek." And Shirou said her daily rape attempts were a waste of time!

…

…

Like a puppet with its strings cut, Illya fell devoid of all hope.

Then all mirth seemed to vanish from Serafall's face as she thought.

"Wouldn't you have to call me Onee-chan, if I married Shirou?"

Illya lost the hope she didn't even know she had still left.

…

Looking at the cationic loli, Serafall decided to try to help her, "You wouldn't have had any chance anyway. He is your brother."

That breathed fire back into Illya.

"He is adopted!" And that was probably the first time in history that the words had been said with love.

"But he is still your adopted brother." Serafall pointed out.

"Shut up!" Illya was so sick of the stupid adoption. If only her idiot father hadn't adopted Shirou, he wouldn't be her Onii-chan and they would have probably been married already!

Hey no one has ever blamed fifteen-year olds of being rational.

And then Serafall suddenly had an idea. A dream so evil that the Great Red himself felt it, thousands of miles away.

"You know, if I manage to snag Shirou I can force him to take you as a mistress." Shirou and his sister too, the day couldn't get better!

And so Illya was tempted

And so, a deal was made.

(Event Unlocked: Deal With Devil)

And far away slept the boy whose soul had been damned.

Great Red was pacing around and screaming," I am telling you man, something Unholy has happened. The fates are going off their fucking heads!"

Shirou who was really tired replied.

"Relax red, what is the worst that could be happen?"

(Event Unlocked: Yeah, he just said that.)

Author's Note: Thanks for the great reviews last time. See you next time.

Till then, RATE, REVIEW AND SUBSCRIBE!