Fate/Grand Order Alternative (up for adoption if you want)

Chapter 7: Singularity F: Confrontation of the Monarchs of Camelot Britain

The battle within the caverns already commence as soon as both the King of Knight and the King of Storm clashed their respective Excalibur. Minor shockwave erupted from the two combatants as their swords meet, destroying the landscape. Luckily Mash alone was enough to protect Ritsuka and Olga Maria, while Galahad protected Maiya and Merlin who were busy purifying the tainted grail. They need to purified the copy quickly before it could cause more harm to the timeline.

Just as the master and caster began to make a breakthrough, Artoria turned her attention towards them as she felt the shift in the grail power and lunch her attack, only to be countered attack by Lancelot and Gawain who had remained hidden within the shadows. The two Sabers tagged teamed against the King of Storm. Their combined skill and strength managed to overwhelmed and pushed her away from their master and comrades.

Once the corrupted Saber was a distance away from any of the magus present, the two sabers was switched with her male version, who ruthlessly yet skilfully exchange blow with her. She was astounded by Arthur strength, there was no sign of him exhausted nor breaking a sweat. Instead, he too was overwhelmed her like the silver and blond hair sabers had done.

Arthur was angry, angrier than Lancelot, and his queen and knights know that. Facing a corrupted self that failed to lead Briton to be a prospered country, protecting and proving their people and abandoning one own humanity? Oh he could bare it.

But when he saw that the monarch who shared his legend was a woman, a teenage girl none the less, Arthur swore he's going to kill this world Merlin for stripping the teen of her life and just as he was planning to forgive her on her failure to achieved what he had, the girl king attacked his teacher and adopted daughter. This...will not let her get away unharmed and unpunished from a King of Knight who treasured his family above all else.

As both of the Monarch of anciant Britain and Alternative Britain put some distance between them, the other servants already went into defensive, ready to protect the humans in the cavern from what were about to come. Artoria raised her corrupted Excalibur, already dark, menacing miasma surrounded her and her weapon.

Trusting his knights would protect his daughter, teacher and the two humans, Arthur mirrored his counterpart's stance, multi-coloured lights surrounded the male king like rainbow as the holy blade emitted a warm golden light. Unlike Artoria though, Arthur was also surrounded by small, flickering lights. His grip on his Excalibur tightens, and both of them chanted their aria.

"Iron Hammer of the Hollow King."

"The Light of Victory Shines upon us,"

"Overturn the Aurora."

"Holy blade carries the dreams of every warrior,"

"Swallow the Light!"

"From the Past to The Future to Eternity!"

"EXCALIBUR MORGAN!"

"EXCALIBUR!"

Both noble phantasms collide against each other, light against darkness. The attacks cause shockwaves throughout the caverns, blowing away dust and pebbles away in a gust of strong wind. But it was clearly Arthur's attack was stronger than his counterpart as the darkness of Excalibur Morgan was swallowed by Excalibur's holy light due to her being already exhausted from dealing with five out of six servants which was her opponents asides from caster who managed to get away. Plus, with Merlin and Maiya purifying the grail, her connection to it gradually disappeared.

With Artoria weakening states affected her noble phantasm, Arthur's own noble phantasm managed to break through the dark pillar of energy and hit the female king, successfully destroyed Artoria armour and severely wounded her. That was when his teacher and daughter managed to fully cleanse and retrieved the grail, teleporting away from the location and reappeared right in front of a shirtless Chulainn who had arrived just in time to see the finale.

Despite defeated, weaken, and badly wounded by Excalibur, the corrupted king managed to stand up. However, instead of a flown, a small smile embraced her feature, soften it slightly. "Hmph. Unbeknownst to me, my resolves had weakened. I stayed my hand at the very last moment and was going to defend the Holy Grail till the end. But I lost because my tendency wavered, when I saw a male version of myself surrounding by his knights." She stopped, shifting her gaze towards the said counterpart.

"Arthur Pendragon, I admit I'm jealous to see that your bond with your knight wasn't severed like mine did. Be sure to treasure them where I've failed," Artoria advised, sounded like a wise sister counselled her younger brother. Maybe it was, but Arthur and his knights were older then Artoria and her knights due to their origins. Despite that, the King of Knight nodded, giving her his respond. "And I always will be. After all, they are my family," he said, smiling softly and fondly at the memories he had with those he calls his family.

Hearing the answer, the female king seems to be satisfied. "Ultimately, no matter how my fate changes, I will always meet the same end if I'm alone," she said. "what's that supposed to mean? Bastard, what do you know?" Chulainn yells his question. "Eventually, you too will realize it, Ireland's Child of Light." Saber pause, taking a breath before continued, "Grand order... the battle to obtain the Holy Grail has only just begun... with you already obtained the first piece," the King of Storm disappeared into particles of gold light.

"Hey, wait! What do you mean by- Oh crap! Looks like, I'm being send back as well" Chulainn exclaimed as he saw his body too, was slowly disappearing as well. "Master, I'll leave the rest to you guys. If there's a next time, try to summon me as a real lancer. A support-role just not for me," he said to Ritsuka.

The caster than pulled out a card, giving it to his already tired master. But that's not all, he also gave her a pair of rune stone earring similar his own. Obviously, he wants her to wore them, and the female master knows that. Maiya acted as his temporary master, Chulainn had to admit that he was already attached to and love the young woman. "For you, my lady, I don't mind being summoned as a caster. Serving under you was great. So hold on to Gae Bolg for now..." that was his last word before returning to the Throne of Heroes, leaving a teary master behind.

After both the caster and the saber of Fuyuki Holy Grail War vanished, returning to the Throne of Heroes, Miaya was began to leaning heavily against her staff, the item supported its wielder's weight since the magus was clearly worn out. she almost loses her footing when someone scooped her up in a bridal style carry. Directing her gaze, they collide against the lavender gaze of her uncle, Galahad, who gently shifted her to a comfortable position.

"Just sleep, sweetheart. That fight between the kings and the Grail purification had drains you of your energy. Let us take care of the rest for now," her uncle whispers, softly coaxing her to take a nap. Maiya let out a weak protest, mumbling that there's still something she had to do. But Galahad persistence and the combination of the rain flame had causes her to grew drowsy. In the end, the female master gave up, drifting out of the reality world as she lets darkness swallow her vision.