[center][img]https://i.imgur.com/MHKBDGF.png[/img]
[h3][color=FFF8DC][b]Skuld[/b][/color]
(Former)Tohsaka Manor, Foreigner's Lowlands[/h3]
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The boundary field collapsed under the constant and unremitting assault. There was no defense that could oppose the greatest Noble Phantasm of the war, System Keuranos. The destruction of Ajax and Skuld would be a mere matter of course. The second coming of the God of Thunder eradicated everything it touched lacking any distinction. It was nothing short of a divine judgment on whatever Tesla pointed his hand at. The storm and even World dropped on Fuyuki were nothing compared to it in terms of its capacity for annihilation. Well, at least in terms of 'pin-point eradication'.

The figure of Caster faded away as the lightning contacted it. No, it was better to say it was overwhelmed and completely destroyed. There would be nothing left of them after such an attack. 

It was over in a moment.

Tesla had ended the drawing of mana from the Tohsaka leyline and eradicated two servants in one simple stroke. With that, there was nothing left for Archer to do here. No, with the use of SK in his injured state, fighting simply wasn't possible. Receiving support from both his master and the leyline would be required. If he even attempted to fight, there was no doubt that servant Archer would fade away almost immediately. Everything had a cost and of course, the strongest attack would have the greatest fee. Tesla would return to the Church and rest until he could properly fight again.

But. 

Just before that. 

The impossible happened in a singular instant. A power inherited from the Age of Gods. A mystery beyond modern magecraft. Spatial Transference through multiple dimensions as a form of high speed movement, perhaps? Or it could have been a form of innate time control instead.

It didn't matter either way, the result was certainly the same. In an imitation approaching Magic, the Berserker who had been previously standing near Skuld appeared behind Shuten and Tesla not twenty meters away. Their line of retreat had been completely cut off.

No, not only that. He was far stronger than he had been before this point.

---

An interface with the land, the capacity to calculate(see) an overlooking view, and a blanket of familiars across the entire city. Thanks to that, Tesla's arrival was no surprise to Caster beyond his new friend. An Archer class Servant with long range prowess. By not approaching her directly he was openly showing hostility. The choice going forward for Caster was clear. 

The great ritual had already been completed for awhile, so by this point she was just taking mana from the surrounding area. 

That was of no particular importance to her.

Skuld did not need to consider if he was betraying her or not, at least for now. The moment he had arrived, she activated the 18 original runes to form a barrier that could stop even a great Noble Phantasm. 

Caster supplemented it with shields prepared using the various engraved formula on both the air and ground. Each one was at the level of A rank thaumtaurgy, forming a defense equivalent to a castle wall. It was an insanity that only took a moment with the level of preparation that was already here. 

Yes. This was the power of Caster. By preparing in advance and deploying as many defenses as possible in an instant, she constructed a Fortress out of nothing. This was a requirement to fight in the first place. Caster was the weakest class, but they were also Magi. Cheating was the only way to win against other Servants. 

They were great Heroes with mysteries that exceeded magecraft. Not only that, many had high level magic resistance after all.

But she had no intent to remain. Activating those defenses was only to cover a retreat. Of course Skuld would not face a man she had a non-aggression pact with. It would be unfortunate for her to sour relations with one of the caretakers for one of Fuyuki's cardinal leylines. It wasn't like he properly knew it was someone he had a non aggression pact with. Caster simply left using instant transportation, taking Ajax and Serafina with her. 

A skeleton crew of familiars were left to maintain the field and defenses, while she did not bother to remove her mirror image. It would be interesting to see Tesla's reaction to that afterall. Very interesting.

The party on top of the Tohsaka leyline was already gone by the time he began to actually use his greatest attack.