"Yoru, who are you actually?" Rias ask with a fear and disbelief face.

"As strong as Sirzechs nii-san. I never know he can control time and space." Add Rias.

"Me, I'm just a human though. Even though I'm more then normal human, but I'm still human." Yoru smile.

"Are you a Hero?" Rias asking again.

"Nope, even though those chess pieces said that I'm a savior." Yoru said with a slightly joking face.

"I'm asking seriously here." Rias look annoyed.

"And I'm answering you seriously too. I'm just a strong human, but I don't know why they calling me savior " Yoru smile.

Rias looked very annoyed with her pouty face. Akeno just smiled seeing it all. Meanwhile, Koneko and Yuuta forcing themselves to smile.

"Let's not thinking abut that. Just think that I'm your brother friend." Yoru smile.

"Huhf... Whatever. So, did we just need to use our power? Where's the target?" Said Rias with annoyed face.

"I will generate some of the zombie and some special zombie." Said Yoru.

And after that, a lot off light particles appears and gathering at a lot of place. And then that light particles gather and became shining ball, and not long after that the ball cracked and a zombie came out from that ball.

Rias and the other clearly shocked by what happened.

"They're not real and just an illusion. However, everything you do and feel here is real."

"Did we only need to use our power toward them?" Said Rias calmly, even though she's still hard to believing what happened.

"Yes, you just need to kill them."

Rias then look at the other three and nodded her head. Not long after that, Koneko run toward the zombies and crush their head one by one.

For Yuuto, he take a sword that came out of the ground near him and use that sword to kill all the zombie that came bear him.

For Akeno, she's using transformation to changing her clothes. And now she's wearing a traditional miko attire, consisting of a white haori with red accents, a red hakama, and a pair of zōri with white tabi. And after her transformation finished, she's immediately create a lot off magic circle above the zombie horde. And not long, elemental magic came out from that magic circle and obliterate the horde.

And for Rias, she's not that different from Akane. She using her power in form of magic. The difference is just the scale and he magic form. Akane magic is in the form of elemental like fire, water, ice, and so on, but she's most adept at using lightning. As for Rias, her power is tends towards destruction. So, her lump of mana is already a destruction on itself, and when she using her magic, her destruction power is rose up and touch the realm of annihilation.

"Damn, isn't he power scary?" Said Yoru.

"Yeah, her destruction is more than what I can do using my Oni Dance." Saeko responded.

"Not only her, that boy also strong. He using his speed to the max." Shirley praised Yuuto.

"That little girl also strong. Her way of fighting is like me and Saya." Said Fiona.

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"No, I think she's different from he two of you. She was very focused with her hands, and only used punches and kicks, while you two sometimes use gun." Said Yuko.

"I mean when we use our punch." Fiona explain.

"And the one that transform earlier. Isn't her magic to much? Is she an S?" Said Miki.

"The important part is, they are very strong. Stronger than all of us if we don't use equipment." Shirley said with serious face.

"Fiona, how much serum a person can use?" Ask Yoru.

"One dose per person. I try to use it more than one, but the second didn't have any effect." Answer Fiona.

"So, Saeko and the other can use once." Add Fiona.

"It's good then. At least you all can became a little stronger." Yoru smile.

Not long after that conversation, Rias and the other already kill all the zombie and walk toward Yoru.

"Is this enough?" Ask Rias.

"Yeah, more than enough actually. You can rest for now." Said Yoru while pointing at a table full of snack and drink.

"How long have we been here?" Akane asking.

"Two hour. It's equal wiyh 15 minutes outside." Yoru answer.

"So it's 1/8. Can we use this place for training?" Ask Rias.

"Training for? Didn't your world a safe world?" Yoru confused.

"Yeah, but we have something called Rating game. Usually we use this game to solve problem." Rias explain.

"Can you elaborate?" Yoru curious.

"This game is a team fight game. Like what your enemy is. We use a chess pieces in this game. Me as king, Akeno as queen, Kiba as Klknight, Koneko as rook, and my last member as bishop." Rias stop to drink her tea.

"Only one each type, and where is your pawn?" Fiona ask.

"We don't have yet. I can't carelessly add new members. Each piece have it's own power. So the member that I want to add must corespondents to the piece I have."

"Rooks gain superhuman strength, leading to high offense and defense. However, they are not very quick, and can get beaten easily by a high-speed opponent. And Bishops gain enhanced demonic power and magical abilities which they can use to conjure up a multitude of spells such as offensive, healing, etc. However, more powerful spells consume most of their demonic and magical powers, which takes a long time to regain, forcing them to use their power carefully or risk becoming vulnerable to physical attacks. As for Knights, they gain increased speed and mobility, enabling them to perform high-speed attacks and maneuvers. However, their main weakness is their low defense, making them vulnerable to powerful attacks if they are not careful. Another weakness among knights are their legs. If their legs are injured, their mobility is greatly reduced. As for pawn, this piece traits l is the ability to promote into a Queen, Rook, Knight, or Bishop when they in enemy territory or with the permission of their King. So this one is the most versatile. And the last is Queen. Queens possess all the characteristics of Rooks, Knights, and Bishops, making them the most balanced piece as well as the most powerful. Within individual peerages, Queens typically act as their master's second-in-command, overseeing the rest of the peerage. In my case, Akeno is the one who give instructions if I have to focus on the fight with the enemy King." Rias explain.

"Hmmm...." Yoru silent a bit.

"Where is the King piece?" Ask Yoru.

"King pieces are rare pieces created in the early days of the Rating Games. Unlike the other pieces which grant special abilities, the King Piece simply boosts a person's power. However, the King piece's strengthening is anywhere from 10 to 100 times and more. Even though it's a powerful piece, it's have restrictions to its use. One, the user cannot already have an Pieces because the King piece would overlap with their current pieces and expose them to user to dangers. Two, the user can potentially die if the boost are too strong. Because the body can contain and control the boosted power. There are only nine unused King Pieces in existence, but they were banned by the current government from use for fear that demon would use it to pursue evil desires." Rias calmly explain.

Yoru and the other shocked and just silently looking at Rias. Rias was slightly uncomfortable with Yoru and the others gazes and it make her embarrassed.

"What?" Ask her.

"No, it's just a little unbelievable. A demon talking not doing an evil deeds. It's just, you know..." Yoru scratched the back of his head.

Rias only sigh after hearing what Yoru said. Akeno smile, Yuuto nodding his head and Koneko just silenly eating the snacks.

"So, did you need this place for training for that Rating game?" Yoru trying to change the subject.

"Yes. Even though we didn't have any game in the near future. But, better training regularly right." Said Rias.

"I don't have problem for that. But, is it okay for you all to came here often? You know, this is in different dimension you know." Yoru a little anxious.

"I will ask my brother later. I will give you the answer before the war tomorrow."

"Okay then."

"Can I ask you something." Yuuto said with a slightly curious face.

"Yes, what it is?"

"You said you want to make something for us right? Did you already have an idea?"

"Yes. A gauntlet for Koneko, and Sword for you. As for Akeno and Rias, maybe just some magic enhancement. I will also give you a defense accessories." Said Yoru.

"Oh,,, if you can give me 1 billion dollars. I can give you an artifact."

Yoru then take out the imitation Gaebolg from inventory and said. "This one is Gaebolg, a demonic spear, it's just an imitation though. The real deal strikes have a fatal blow that always pierces the opponent's heart and ruins their body from within with its thousand iron thorns."

Yoru then place the Gaebolg imitation on the table. Yuuto take it and try to swing it a couple of time.

"I'm not used to spear, but, this is a good weapon." Said Yuuto while swinging Gaebold with a smile on his face.

"Can I ask something to?" Akeno said.

"Yes?"

"The staff that floating behind you. It's not normal staff right?" Akeno said.

In that momen, Yuuto stop his swing and immediately focus at Yoru. Rias also silenly look at him. Even Koneko, who had only been eating since earlier, immediately stopped eating and looked at Yoru.

"Yes, this one is a little expansive weapon. 30 billion dollars."

Everyone gaped at the price Yoru said.

"But, his one is not a normal staff. This one is Merlin's Staff. You know about the legend of King Arthur right?" Yoru smiled proudly.

"The one from England?" Rias said.

"Merlin is a prophet and advisor who made his entry into Arthurian Legends as the court magus. He would at times guide, at times torment, and at times help King Arthur as a king so that he could overcome many enemies and hardships. Still, though he is a wise man, he is fundamentally inhuman, because he was born of mixed blood from the union of an incubus and a human. With illusions as his forte, he can transform into various shapes. There was a case where he had changed into the shape of a beast whose insides are not human. And his true form is not certain. And for certain, he's a grand magician." Yoru explain.

"But, if the owner is inhuman. Why I can feel holy power from that staff?" Rias asking.

"Oh... About that." Yoru then take out the hidden Excalibur from the staff.