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Shirou tried to keep his anger under control as he projected the three weapons needed for this task.

First was the Azoth blade, he had once gained from Tohsaka. Second was the weapon of Hero Roland, and Last but most important the rule Breaker.

Taking a deep breath, Shirou laid down the two Noble Phantasms and slashed at his left palm with the Azoth blade.

He winced at the pain but using his index finger and blood, Shirou drew a runic circle around the unconscious form of Sakura.

With his origin and attribute being the same he wasn't able to learn much magecraft other than improving his proficiency in projection and reinforcement but thankfully he wasn't without hope as he was still able to learn the basic attribute less magecraft like Repair, Displacement,Set and Runes.

All of them things which most mages considered useless or petty tricks but to Shirou Emiya, they were invaluable as he didn't have much talent or versatility.

Shirou sighed as he finished the runic circle, now it just needed a core and mana to activate.

As for the core it was obviously the Azoth blade. As for mana,Shirou hoped he had enough, if not he will just sacrifice a few years worth of prana. That should work as well.

Shirou frowned even more as he looked at the slashed palm. It had stopped bleeding but it was healing so so slow, despite him possessing the strongest defence and self healing type Noble Phantasm, the ever distant Utopia, Avalon.

But he didn't have time to worry about this as he was focused on something far more important.

With everything ready, Shirou held the Durandal in his left hand and Rule Breaker in his right hand as he activated one of the three miracles stored in Durandal, it's power decreased due to being a replica and needing the blade's permission for its activation.

Thankfully, his wish was granted as the miracle unfolded, the Crestworms in Sakura Matou suddenly vanishing from inside her as they appeared in front of Shirou in confusion.

Shirou didn't hesitate as he attacked the worms with Rule Breaker, a Noble Phantasm which was barely considered above average in its time where magics were all about Mysteries but in the modern world which was based on Logic and Order, it was the nemesis of all magics.

To use it you just needed to know what you wished to cancel as it only worked on one thing at a time. But Shirou Emiya already knew what he wanted as he Slashed at the nearest crest worm, targeting the very magic which bounded Zouken Matou's soul to physical world when he should have died a long time ago.

The move working as the worm let out a human shriek before dying as it's two seperated halves moved turned into dust. The other worms also let out shrieks as they too faded.

Before Shirou could relax though he the temperature seemed to drop as he felt a chill the mud activating and trying to take over Sakura's body.

But not on Shirou's watch.

He hurriedly activated the runic circle, chains of light coming as they bound Sakura's body tightly.

The Runic circle then started to give a holy aura as a light of exorcism appeared, trying to purify the mud but only being able to supress it for a while.

Shirou moved again as he hurriedly stabbed the Rule Breaker in her stomach activating the Noble Phantasm once again as he seperated the mud from Sakura. The Noble Phantasm turning illusory not harming physical body of Sakura and only affecting the mud, sensing it's masters intention.

His mana reserves running dry as they tried to provide more mana his eyes darkened with a need for rest but he pushed through it.

It wasn't done yet as the familiar form of black-red mud girl appeared on top of Sakura trying to run from the light of exorcism, Shirou would give it no time though. As he pushed his very life essence, his prana in the runic circle.

"Haaaaa!!!!"

The fragment stood no chance as a decade worth of life energy powered the runic circle as more and more white hairs appeared on Shirou's face. The Azoth blade replica turning to spiriton particles from overuse and the burden on it from all the prana.

Light faded as a sweaty and tired form of Shirou appeared Durandal and Rule Breaker disappearing on their own.

And then he passed out on top of Sakura.

...........

If someone were observing this series of events, especially a well trained mage, they would shake their heads in exasperation as even putting aside the fact someone so wantonly using their life force, the fact remained that Shirou Emiya overestimated his enemy and used too much of his life force uselessly. If it were a normal mage they could achieve the same feat in just 2 yrs worth of life but this was Shirou Emiya who had Avalon in him since his childhood. He was only required to pay 2-3 months of life energy, 6 months at most.

But as the law of conversion of energy goes, energy only changes forms. After the mud was exorcised the remaining amount of energy went into Sakura's body in a rush as it healed whatever damage to her body Zouken and Shinji had done.

Even hidden scars and internal injuries were healed in a matter of seconds. Undoing all of his spells since they were of Curse and Dark attribute and the energy was from an exorcism circle.

This continued as the command seals which would have originally belonged to Sakura, through this wondrous connection appeared on Shirou's right hand.

Becoming a master once again but with different set of command seals.

........................

In Matou Household's Basement.

Sensing the passing away of Zouken Matou, the worms which would normally be used to 'mold' ( read torture) became berserk without any supply of mana and turned on each other.

Such was the nature of these worms.

As these worms attacked and killed eachother a phenomenon similar to a dark art called Kudoku appeared.

Just a single difference being that these worms were carnivorous mana eating insects instead of poisonous one.

Considering the numbers and rate at which they killed eachother, this event would go on for more than a day.

If left unchecked.

...........

Elsewhere,

One Waver Velvet or now known as Lord El Melleo II of the Clock Tower and his student Gray had just arrived at the Fuyuki City.

Waver was lost in thoughts reminiscing his time with Iskander,Rider of the fourth Holy Grail War when a yelp of pain brought him back.

Looking to his disciple, he saw the girl rubbing the back of her hand.

Immediately many thoughts passed his mind as he hurriedly checked her hand and his guess was proven true as there it was in all its glory.

The brightly shining red command seals.

Hisss

He inhaled sharply as he realised that although he dearly wished to see his friend and mentor Iskander, his disciple would have to participate in the holy grail war, the same holy grail war which traumatized him to this day.

He opened his mouth to say something but didn't know what to say.

......................

Meanwhile all the slots for grail war were filled.

1) Shirou Emiya ( Sakura's Command Seals)

2) Grey ( Shirou's Command Seals)

3) Rin Tohsaka

4) Bazett Fraga

5) ?????( Medea's former Master)

6)Illya Von Einzbern

With last slot going to a 14-16 yrs old homeless or run away looking black haired girl, who had let fate guide her here.

................

Chapter Title: Butterfly's Flap