Arthur's Excalibur

"Master, I have no intention of this being our end." The Saber stared, his usual soft face having taken a serious stare as he looked down at the Redhead, gripping his hands around the blade he wielded "It will likely cripple our team more but it is the only way to ensure victory." He'd move to the front lines as I could do nothing but watch him his hood falling over revealing the short blonde hair as he raised his blade, she already knew what he was going to do and thus steeled herself as she stood straight and watched him, raising her hand as one of the red seals upon it began to glow.

"Arthur by my Command Seal, I order you to unleash all Thirteen Seals of Excalibur."

https://www.youtube.com/watch?v=25d1CPOGrGM

He nodded, as he stared straight at the torrent of death that had wiped out their forces that was now coming toward them, he was ready this blast would annihilate him in the process but give his master, the chance they so desperately needed now to win this war and more so secure Humanity's Future, yes this was the perfect time.

“Yes. Let's put an end to this.” He'd clutch the sword as he brought it up in front of him the invisible air blowing away in a large gust as he began

“Seal Thirteen──Decision start!”

A voice ringed in his head.

“───Approved. 	Percival, Kay, Bedivere, Gawain, Lancelot, Gaheris, Gareth, Tristain, Palamedes, Agravain, Mordred."

"This... Is a battle to save the world!"

"Arthur."

"EX--CALIBUR!"
https://youtu.be/ZGbNk2WgAVs?t=9
Everything went white the sword had at this rate become a massive beam of light that when brought down engulfed everything the torrent of death unleashed by Mordred Alter, had disappeared just at the mere presence of the light shining from the sword and all of Camelot had been engulfed around us the earth shook as the giant beam that was comforting to gaze upon pierced the sky itself going into the very space, my vision fading to white for a brief moment.

And when it returned the Walls of Camelot and the lower half were gone nothing remained there as if they had been turned to ash, a massive scar within the land that ran deep went all the way up to the keep within the middle of Camelot itself, the walls surrounding Camelot itself were gone turned to ash, if Mordred had any forces behind that wall they were gone destroyed instantly.

However the light's shine could still be seen as bits of it fell upon the battlefield, warmth spreading through my body, I suppose this was the real nature of Excalibur it was almost on par with Gilgamesh's EA, no I'd say it was as powerful if Gilgamesh used it at Half of its Output maybe, even more, to think all this time all we saw was just Seven seals, with all Thirteen removed it was as if the world itself had stricken down Camelot, however, I was positive that the light itself had engulfed almost half if not a majority of Britain itself.

All she could think of was the memory that she had dreamed of, one from Artoria's 4th Holy Grail War, the words spoken by the woman, Irisviel during it described the scene perfectly.

"It shines. That sword... It is the dream that all warriors, past, present, and future hold as their death approaches, a sad exalted dream he carries their will as his pride bidding them too remain steadfast in their loyalty, So the undefeated king sung allowed its name, the miracle that he holds in his hands and its name is Excalibur..."