Yusei carried the bound Ryunosuke back to the residence where Sakura was staying. As for the innocent woman, he had untied her, he believed she would call the police herself once she regained her senses.
"Onii-chan?" Sakura, who was eating breakfast in the living room, greeted Yusei politely, completely ignoring the trussed-up person in his hand.
During this time, Sakura's psychological growth had been remarkably fast. She was already accustomed to such sights.
Yusei patted Sakura's head in response and then went into the room to carefully observe the movements of the various factions.
'Caster is really decisive in his actions.'
Yusei hadn't expected that within half an hour of him issuing the Command Spell, Caster would already be charging towards one of the other Servants.
It was important to note that the command Yusei gave was to fight the other Servants, but it didn't erase Caster's reason. One would think Caster could prepare first before engaging in battle.
"Well, that's fine too. It can end sooner this way."
"Hmm? He's heading straight for Lancer? Tch, what luck. Caster isn't going for the Ahoge King first." Yusei commented.
However, he could only sense the locations of the various Servants, like a radar, and couldn't share their vision.
Even though fighting during the day might cause a commotion, that wasn't his problem. The magi should be the ones with headaches.
Meanwhile, at a luxury hotel...
Kayneth and his fiancée, Sola-Ui Nuada-Re Sophia-Ri, were arguing over Lancer.
"Why did you send Lancer away? What if other Servants come?" Sola-Ui said.
Kayneth's face was dark. After last night's dream, he absolutely refused to let his fiancée and Lancer be together.
Early this morning, he had sent Lancer out under the pretext of scouting the enemy, but it was really to keep him away from Sola-Ui.
He hadn't expected Sola-Ui to argue with him about it.
He couldn't lose his temper with his fiancée, so he could only glare angrily at Lancer.
"Lancer, don't tell me you-" Before he could finish the sentence, "-don't tell me you covet your Lord's wife?", the door to his luxurious suite was blasted open.
"What?!" Kayneth was shocked. His bounded fields had failed?
"My Lord, please step back! Leave this to me!" Lancer gripped his spear, his gaze sharp as he looked towards the explosion's dust cloud.
As the smoke cleared, a hunched figure appeared, cackling strangely.
"Lancer, let me introduce myself first. I am a Servant of the Holy Grail War, Class Caster, here specifically to kill you."
Caster, emanating a sinister magical aura, seemed to be in an unstable mental state, constantly letting out weird laughs.
This bizarre scene put Lancer on guard. Although his parameters completely outclassed Caster's, with his Master present, he didn't dare act recklessly.
"Let death descend upon this place! This is my revenge against God!" Caster screamed, his body suddenly swelling. In just a few seconds, his form threatened to burst through the room.
"My Lord, please evacuate first! The situation is strange," Lancer said.
Although Kayneth disliked Lancer, considering his loyal defense just now, he responded, "Hmph, I know."
By the time Kayneth and the two others escaped the hotel, the monstrous body had already crushed the building.
Without a doubt, Caster had completely lost control!
Yusei didn't need to sense it, he could see from his window a plume of thick smoke rising in the east, right where Caster and Lancer were located.
"He lost control just like that?" Yusei hadn't anticipated this development either.
After a moment's thought, Yusei looked at Sakura, "Have Berserker keep an eye on this guy. I'll be back soon."
With that, Yusei instantly vanished, using Shinsoku to rush towards the incident location.
The area was already enveloped by a large-scale suggestion field deployed by Kayneth.
Any ordinary person approaching the nearby streets would instinctively turn and walk the other way.
Although he didn't care about these ordinary lives, if the mystery of magecraft was exposed, it was a risk he couldn't afford.
So, no matter what, he had to deploy this highly mana and resource-consuming suggestion field.
Whoosh!
A sound of rushing wind, and Yusei's figure appeared before Kayneth and Lancer.
Seeing the Ruler appear, Kayneth immediately complained, "Hey! Is this rampaging monster also a participant in the Holy Grail War?"
"Of course it is. Its true identity is Caster. The reason for the rampage is unknown, but since it's affecting others, we must gather all factions to eliminate it."
Hearing this, Kayneth's expression improved slightly, 'Why was I so unlucky? Not only was my catalyst stolen, I encountered a knight who might cuckold his Lord, and now a monster attacked me. What had I done to deserve this?'
While sending information to the other factions, Yusei glanced at Kayneth.
"The task has been issued. The faction that kills this monster will receive one Command Spell. However, it will take some time for everyone to arrive. Until then, we can only hold it off."
"Hold it off?! By myself?!" Kayneth's eyes widened as he looked at the massive monster writhing towards them.
'This thing was already on the level of a True Ancestor, wasn't it? And its gigantic form made it difficult for my Mystic Code, Volumen Hydrargyrum, to be effective.'
Yusei showed a sunny smile, "Of course not. As the Ruler of this Holy Grail War, I will also contribute my share."
As if to prove his point, Yusei stepped forward and appeared over ten meters away in an instant.
[Shinsoku]
The manifested Noble Phantasm in his hand, a sword, glistened. In the next moment, Yusei's speed increased explosively.
For an instant, Kayneth and Lancer seemed to see time stop. Nine afterimages of Yusei appeared, each slashing out once.
"Hiten Mitsurugi-ryu Ultimate Technique: Kuzuryusen!"
Yusei's figure reappeared, landing behind the giant monster, his sword already sheathed.
Behind him, Caster's body froze. Nine extremely deep sword marks erupted simultaneously, spewing forth black, disgusting fluid.
Seeing this, Kayneth was both amazed by the Ruler's power and relieved that Caster had stopped moving.
However, this relief lasted only a few seconds before the previously motionless Caster began moving towards Kayneth again, the wounds healing rapidly.
"What?! What kind of regeneration is this?!"
Kayneth quickly looked at Yusei, "Ruler! What should we do now?"
Yusei, standing at a distance, could only scratch his head and offer an apologetic smile, "Uh, well, how should I put it... that move just now was my limit. From here on out, you'll have to figure something out yourself."
Hearing this irresponsible reply, Kayneth shouted in frustration, "Hey! Use your invincible Ruler's class abilities and think of something!"