AN; There'll be multiple Noble Phantasms unleash during this chapter. If you all wondering that there are some changes in the previous chapter it's because I use Grammarly to check over my mistakes.

Ch 25 Battle at the Lake

Everyone knew who this woman was, the snake hair is a give away even the wizards know of her. They were trembling in fear that she might attack them, then Mashu walks forward with a smile "Gorgon," she said receiving gasps from the wizards. Hermione walks next to the former demi-servant "YOU KNOW HER, MASHU!" she shouts at her, surprised at the fact that she knows the killer of Greek heroes.

"Hai, Hermione-chan! Gorgon is one of the most powerful servants that Senpai has contracted to him," she informs her "You're saying that monstrosity is one of my son's servants!" Lily said gulping of what other beings that her son has. An alluring song was coming from the lake, they all look to see mermaids singing making the Hydra stronger by the minute. "Ms. Kyrielight, we need to find master out there immediately," Sherlock said as the servants got on the Golden Hind. She nodded and quickly went over to the plank before she was stopped by the order and the Minister. "We're coming with you," James said to her. "Whys that Mr. Potter?" she asked.

"Because that monstrosities out there must be taken down!" Fudge exclaims pointing at the Avenger and Demonic beast. They all look at them with anger when the foolish Minister added Gorgon in his sentence. "When did you put Gorgon in with the Hydra together, Minister?" Galahad asked coming next to his pseudo sister. He looks at him like he grew a third head. "Why? Because that monster kills heroes for a living and-" "I only serve my master's will and would protect him at any cost even if it involves protecting you pathetic excuse for a human," her eyes glared at Fudge who simply cowers away behind Dumbledore as the snakes take on each of the heads. he looks at him with disappointment as he tries to negotiate with the Chaldean servants.

"Ms. Kyrielight, please let us help taking down that Hydra, together we might defeat it." She looks at her pseudo brother and nods "Very well, get on the Golden Hind and we'll discuss the plan with everyone." She said as they lead them on the boat. Once on they were shocked to see the varieties of people. "Oh? What are these pathetic humans doing here?" Meltryllis said leaning down to face them. they back away at the sight of the Alter Ego and her limbs. "Meltryllis, we form a temporary alliance to save Senpai and defeating the Hydra," Mashu explains as the servant huffed away. They all gather in the center of the boat as a holographic map of the lake appears, "What kind of magic is this?" Dumbledore said clearly never seen a hologram before nor the others. "It's a hologram of the Black Lake, here is Gorgon and here is the Hydra." She points out the points out every detail of the map explaining how Chaldea has this technology "How can muggles create this?" Fudge said thinking before muggles are uncultured swine that has no intelligence at all.

"It's called the human mind, Fudge. Get with the times." Drake said snickering at his stupidity. "For what we know, the mermaids are supporting the Hydra with their songs," Sherlock observes them as they sing. "Then we must take out the mermaids fast. I'll have my aurors to use Confringo at the mermaids." James said as both Remus and Sirius was about to go and tell the others before Sherlock stop them. "I have a better idea," he said to the three, "And what idea is that?" James sneers at the detective, "James here him out, go on Ruler." Remus said to him.

"Thank you, Mr. Lupin, now to counteract the mermaid's song all we have to do is to have our music." He said as the servants looked at Salieri who just looks confused. "What?" Moody scoffed thing this is a ridiculous idea. "And how can music help? We must eliminate-" I agree with Ruler's idea." Dumbledore said as the order looks at him like he's gone mad. "Dumbledore why would-" "I don't want to have any casualties, if we attack the mermaids they'll retaliate and go on to attacking the students." He explains as they finally got what he was saying.

"And how he is going to do that? Singing?" Charles laughs thinking singing would solve it. Neville, Luna and Hermione shook their heads. "Watch and see Brat," he walks up to the deck and he changes into a menacing red and black armor. "Let's go, the performance is starting."

He said as a piano appears before him and started playing that was familiar to Lily and Hermione. (Insert FGO Dies Irae)

"I am death. I will kill all those beloved by God! Dio Santissimo Misericordia de Mi!"

The song radiates to the sky as he plays with ongoing hatred. The mermaid's song was lost in the ongoing Noble Phantasm from the Avenger. Hermione and Lily finally remember where the song is from. "Merlin, Your Mozart!" Lily said as he laughs maniacally "I am not in any way that fool." He said with anger as he plays.

"Then who are you?" Hermione asked the man in grey "I am the one people said that I killed Mozart, the one who rivals him, I have manifest into the Avenger class of my hatred for that man. I am Antonio Salieri the man in grey!" he announced as the music grew louder by the second. Both of them gasp, seeing the man in person who killed Mozart. "I can't believe it; the rival of the Amadeus Wolfgang Mozart is here as Ritsuka's servant." Hermione stares at his performance with awe along with Lily who admires the composer. Dumbledore could hear the hatred in his music, he was disgusted but in awe of the song then he notices the mermaids. "Look!" Neville said pointing at the mermaids.

They went to the edges to see the mermaids screaming in anger as they attack each other not caring for attacking each other. "Good they're immobilized, Alright men! Take sail!" Drake said as the ship separated as Salieri keeps on playing. "Now we're on track- "Ruler I found something on the map…ITS SENPAI!" Mashu exclaims, Sherlock, walks over to the map and analyzes it. "It seems that he's out cold, Astolfo!" he cried out to the trap. "You got it Ruler!"

He took his stance.

"Show your true power! Hippogriff! "

he jumps up as a hippogriff came from the sky and landed on it's back. Charles and Hermione gape at the sight of the beast. "Was that Astolfo! One of the twelve paladins of Charlemagne!?" Hermione cried in the excitement of a paladin being here in person. "Never mind that, Hermione! She just rode on a hippogriff!" Charles said as the servants laugh at him, he looks at them funny before Reines explains that Astolfo is a man. His face was disgusted when the truth was told to him, Hermione was freaking out that she gets to meet another hero from history.

Gorgon was struggling a bit as the Hydra continues its attack. She then notices the Rider flying in the corner of her eye. "Astolfo! What are you doing?" the Avenger said as she counters ahead from getting to him. "MASTER IS OUT THERE! SO, I'M GETTING HIM OUT!" he shouts as he dives into the water. "Very well, I'll distract this beast," she said as two of her snakes blast a ray to it. Astolfo grabs the unconscious Ritsuka. "Gotcha!" he said as he checks his vitals. "Thank the grail, you're alive still." He flew back to the Golden Hind only to be intercepted by the hydra. The head came after Astolfo as the Hippogriff evades each attempt to catch him.

"You'll not harm my master!" Gorgon shot a ray to the heads decapitating it in the process. The head grew back adding a second one in the process. "Damn, I should've not done that." She said as she intercepts it, she looks behind her and saw Astolfo have reached the ship and everyone rushes to him. Lily, Luna and Hermione cast multiple healing spells at him but it only healed his injuries a little. "Damn it, come on!" Hermione cried as she poured more magic to the spell. "Move," Asclepius pushed them out of the way and uses his skills God of Medicine.

Ritsuka was covered in green light as his wounds healed. "Caster," Mashu said as she checks his vitals "His vitals are back to normal, thank you, Caster." He nodded before looking at the battle "It's a doctor's job to take care of their patients especially their master." Then out of nowhere grindylow pop out of the water and landed on the ship. "Stupefy!" James and Sirius cast stunners at the sea creatures but it seems it's ineffective.

"It's like they're not affected!" Dumbledore cast spells at the creatures. "Fou Fou!" the primate murder cried as a grindylow grabs him "Fou-san!" Mashu cried as Galahad slams the creature with his shield. "Are you okay, Fou?" the knight asked the beast. "Fou!" he cried as it climbs onto his shoulder. "Damn it, they're everywhere." He saw Moody, Ushiwakamaru, and Benkei defending Salieri as he continues to deploy his Noble Phantasm, Dioscuri are helping to fend off the creatures off with Reines, Neville, Sirius, Remus, and James. Astolfo and Sherlock defend Drake as she continues stirring the Golden Hind trying to get to a safe spot for Gorgon to unleash her Noble Phantasm on the hydra and Arturia are in position ready to deploy hers as well, Asclepius is healing his master with the girls. For the Charles and Fudge they're cowering in the corner.

"Saber! Once me, Astolfo, and Ruler gather all of these creatures on the side of the ship deploy your Noble Phantasm!" he said to the twins. "You got it!" both Castor and Pollux said slashing away the creatures. Galahad and the two went to action in gathering all of them in one place making one entity. "NOW!"

"C: Fear.
P: Revere. "

The twin Sabers glowed and jump at the grindylows

"C: The ones shining on the heavens. The stars of guidance! "

They alternated as they attack the group each slash killing one in the group

"P: We descend and stand here! "

They both stop then swirl around each other lunching themselves at them

"Both: Dioscures Tyndaridae! "

Once the made contact the grindylow scatter back into the lake as they return back to the ship. Hermione didn't see the Noble Phantasm as she was preoccupied with Ritsuka. "Alright! Men, let's head back!" they cheered as Drake turned the ship around "Gorgon! You're clear to use it!" she shouts. Dumbledore notices what she said. "Ms. Drake what do you mean by that?" Ushiwakamaru stood next to the old wizard. "Let's just say, we're lucky that we're not in front of Gorgon." He looks back to see Gorgon retracting her hair "Very well,"

"I shall curse you, as you cursed me. "

A circle formed around in front of her as her wings and hair engulfs her body into a pillar

"Melt away."

"Pandemonium Cetus! Ahahahahahaha! "

A black ray of power hurls to the hydra passing in as it turns to stone as well as the mermaids who were caught in the blast. (End Song). There stood a petrified hydra devoid of life. "Shielder, I shall leave. Tell master when he wakes that I have returned to Chaldea." Gorgon said as she dematerialized returning back to Chaldea. Salieri stopped deploying his Noble Phantasm as he collapses from exhaustion. "Is it finished?" James asked as the statue start to crack and tremble. "It's still alive!" Lily exclaims before Sherlock held his hand "This is just a part of the plan, Mrs. Potter." He said which made everyone confused. "What do you mean?" Sirius asked the Ruler. "Look at the sky for the goddess, shall reign down judgment." They looked up and heard the voice of Saber from the ball "Sacred lance, removing restraints..." (Insert Fate/Stay Night [Unlimited Blade Works] OST 2 Excalibur)

"Light, may you be released from the ends of the world. "

They look up to see Saber with a lance, as she lifts it up it shined like the sun emitting a holy light. "Impossible" Dumbledore said knowing what the light is as do everyone who heard her legend.

"Split the heavens and tether the earth, anchor of the storm! "

Her horse Dun Stallion galloped down the sky as she held her lance aiming for the hydra which was cracking trying to get free.

"Rhongomyniad! "

The holy lane penetrates the heart of the demonic beast leaving a huge hole as the cracks increase making the petrified beast explodes into millions of pieces. They shield their eyes at the bright light then once the light fades there stood, the former king who turned goddess. "It can't be…" the wizards gasp not believing their eyes there stood King Arthur King of Knights.

AN; so how do you like it? Please leave a review.