Mash immediately stood in between the new Servant and the two humans with her shield raised as she kept her eyes on him as the man chuckled.
"Don't worry. I'm not an enemy Servant, in fact, if you hadn't killed her I would've done it." Cu said with a chuckle as he looked at them.
"Who are you?" Mash asked as she looked at him.
"I am Cu Chulainn. A Caster class Servant. Though I would've preferred to be a Lancer class. I am one of the last two surviving Servants of the Grail War." Cu introduced himself as he smirked.
"Last two? Then what about the one that Mash just defeated?" Olga asked shocked.
"I would give you more information but I would feel much more confident if we weren't out in the open like this. You don't want to be sniped by the Archer Servant now do you?" Cu said to them causing the girls to become a bit uneasy.
"Let's do as he says." Felix said as he stood up.
"Are you sure Master?" Mash asked him in surprise and uncertainty.
"Yes. We have no clear idea about what is happening so we need the information. And we also need new allies." Felix said to her as feeling came back to his arms.
"Well, I guess you're right. We have no information about what happened here." Olga said seeing the point in Felix's words.
"Great. Then let's go fast before that annoying Archer spots us." Cu said to them and a look of distaste appeared on his face when he mentioned the Archer.
Mash and Olga wondered what had happened between the two Servants to warrant such a reaction while Felix already knew about it.
The newly formed group stood under a bridge as the Chaldea group made sure to stand at a distance. On another note, the Caster was quite vocal about how he liked Mash's look to which he gained a rock to his head from Felix while Mash was confused and Olga was blushing in embarrassment.
"That's one perverted old man." Olga said as she stood with her group.
"I know." Felix said as he looked at the Servant.
"Thank you for agreeing to help us. I am..." Roman said as a hologram appeared from Felix's watch.
"Shut it. I'm not interested in talking to cowards like you." Cu said seriously stopping the doctor.
"Huh?" Roman said surprised by his words.
"I want to talk to the Master." Cu said seriously as he looked at Felix.
"Alright then. So can you tell us what happened here?" Felix asked as he looked at the man.
"Sure. I was summoned for a Holy Grail War, but in the middle it changed into something entirely different." Cu said to them seriously.
"Changed? How?" Olga asked surprised.
"Saber was corrupted by the black mud and then with her newfound strength and the Grail she managed to obtain she defeated the rest of the Servants. But they were also corrupted and brought back to life. The one you fought, Lancer, is a corrupted Servant who had been defeated by Saber and brought back to life by the powers of the black mud." Cu said to them seriously as he looked at them.
"So we still have to defeat 5 more Servants?" Olga said in surprise.
"No. I had dealt with Assassin and Rider before you guys took care of Lancer. The only ones left are Saber, Archer and Berserker." Cu said to her as he waved his hand.
"I see. If what you said about you and Saber being the only ones left then we need to defeat Saber to correct this singularity. But if what you say is true then we also need to defeat Archer and Berserker as well." Roman said as he heard him.
"No. We only have to take care of that Archer. Berserker just roams a part of the city so you don't have to worry about him attacking us. He will only attack if we attack him first." Cu said to him dispelling his concerns.
"Okay so we're safe on that front. But we really need to find someplace to rest. My arms are still a bit numb from using my circuits and we need to make a plan." Felix said to them as she shook his arms.
"Hmm, then we have to be at a place where that bastard can't see us." Cu said to them in response to it.
"I also want to summon a Servant to bolster our forces." Felix added as well.
"Well, I looked up the map of Fuyuki and you are closer to the residence of the Matou family. Since there aren't any humans left that place should be deserted." Roman said to them.
Felix felt a chill on his spine when he heard that but calmed down when he realised that Zouken is already dead.
"Well let's go then. We can't waste anymore time. Just tell me the location." Cu said to them seriously.
To his words a map appeared from Felix's watch as it showed the place.
"Well, let's go then." Olga said with a determined expression.
"Yeah, the sooner we come up with a plan the faster we can bring an end to this singularity." Felix said to them as he also got ready.
"Yes Master." Mash said seriously as she gripped her shield.
Then the group walked towards the residence with Cu at the front. They reached the house and it wasn't an exaggeration to say that it is like a small mansion. Cu made a pathway for them to enter the mansion as the group then sat on the couch and sighed a bit in relief.
"Well, the place is in a relatively good condition." Felix said as he looked at the place.
"Yes. Hey Caster, do you perhaps find any hidden parts of the mansion?" Olga asked the Servant.
"Hmm, yes I can. Do you want to see their secrets or something?" Cu asked her with a smirk.
"And get a place for a magic circle." Olga said to his words.
'She didn't deny it.' Felix, Mash and Roman thought to themselves with a sweatdrop.
Then Cu led them to the hidden room where a good amount of books were there as well. Cu managed to disable the leftover traps laid there as they managed to reach the place. Then they made the magic circle for the summoning before Felix stood in front of it.
"Now don't mess up the summoning. We have a good magic circle and a great amount of mana. If you screw the chant then it will be in vain." Olga said to him in a reprimanding tone.
"Yes director. I'll be careful." Felix said before he sported a serious expression.
Olga along with Mash and Cu stood at the sidelines with Roman also looking at it as Felix raised his right arm.
"Let silver and steel be the essence. Let stone and the archduke of contracts be the foundation. Let red be the color I pay tribute to." Felix chanted as the magic circle lit up.
"Let rise a wall against the wind that shall fall. Let the four cardinal gates close. Let the three-forked road from the crown reaching unto the Kingdom rotate." Felix continued chanting as the circle started to shine more brightly causing Olga and Mash to cover their faces as winds also started to appear from the circle.
"Let it be filled. Again. Again. Again. Again. Let it be filled fivefold for every turn, simply breaking asunder with every filling." Felix continued as the circle drew more mana.
"I shall declare here. Your body shall serve under me. My fate shall be with your sword. Submit to the beckoning of the Holy Grail. If you will submit to this will and this reason... then answer!" Felix proclaimed as light rose from the circle almost blinding him and Olga and Mash but he kept on.
" An oath shall be sworn here! I shall attain all virtues of all of Heaven. I shall have dominion over all evils of all of Hell! – From the Seventh Heaven, attended to by three great words of power, come forth from the ring of restraint, Protector of the Balance!" Felix finsihed as he shouted at the end as the magic circle lit up so much as they were unable to see anything.
Then the bright light suddenly disappeared as a small shockwave appeared. Felix staggered a bit due to the sudden shockwave but managed to keep his balance. Olga meanwhile fell on her butt while Mash kept her balance. Cu meanwhile looked at the summoned Servant with wide eyes before a smirk appeared on his face.
Felix blinked his eyes a few times before he could see normally again. He felt a slight burning sensation on the command spell as it glowed signifying that the contract has been done. He looked at the middle of the circle where the Servant is as his eyes widened when he saw who it is.
"Servant Rider. Medusa. I am your tool to use. If you require a sacrifice, do feel free to treat me as you wish." Medusa introduced herself as she stood in all her glory as she looked at him.
"Well, this is interesting." Felix said as he blinked at his situation.