Author's Notes:

Hello Everyone! Hope you like the latest chapter of Mythos, now I'm going to write the prologue of the third Installment of the Series. In this story Ritsuka followed the Brotherhood to a world where not only are there are Greek, Norse and Egyptian Gods. But also, many other Mythologies as well as the Abrahamic Factions living there.

There they meet and team up with two people who are the vessels of the Alternate versions of the Dragon of Albion. As well as Descendants and Successors of Artoria and some of the Heroic Spirits.

Spoilers for those reading Mythos due to two Greek Characters appearing this Fanfic.

Disclaimers: I don't own any of the appearing in this Fanfic, they belong to their respective creators: Kinoko Nasu, Takashi Takeuchi, Ichiei Ishibumi and Miyama Zero.

Prologue:

The Red and White Emperors and Humanity's Master part 1

3rd POV

In an Unknown Place, Kuoh Town

2018 AD

We then open to the Brotherhood having a meeting with one of them saying, "Damnit! How did Karin get beaten like that?"

"I know right, even though she had help from Bi-Han, Shao and Shang Tsung."

"No matter… Now that she is gone it's only a matter of time before "they" get here." Another muttered.

The leader then sighed at this, "Well looks like we're counting on you now." At this cue a young man with heterochronic eyes that are red and yellow, green hair and a face that is a mixture of Willem Dafoe and James Franco appeared he then answered in a raspy voice, "Of course I can't wait to beat that pipsqueak and that slut into a bloody pulp."

Issei POV

Inside the Hyoudou Residence, Kuoh Town

2018 AD

As we open to a large six story house, We saw groups of people are now minding their own business. With two black haired girls sitting in the living room watching TV these are Ophis and Lilith the Ouroboros Dragons. Currently these girls are living with the Red Dragon Emperor Issei Hyoudou. The Boy turn Devil and lover of the Crimson Satan Rias Gremory.

As they continue to watch Television, the two felt something is about to happen with Ophis asking her clone, "Did you felt that?"

Lilith nodded, "Yes Me… We need to tell the others."

But before they can go, they heard a voice called out, "Ophis! Lilith! Did you sense that?"

"Yes Ddraig… We did."

"Then we will Issei Hyoudou and Vali right now!" Albion replied to the three.

The two Dragons then reach out to Issei and Vali whose appearance are that young men with Issei having brown Hair and Brown eyes. Whilst Vali has white hair and hazel eyes.

"Partner! Partner!"

"Vali! Vali!"

The two Men then woke up with Issei asking, "What is it, Ddraig?"

Vali who was in the chair near Issei's bed nodded, "I agree with Issei Hyoudou here, is there something that's bothering you, Albion?"

"Yes… Call the others! We felt something amiss in the Dimensional Gap, Ophis and Lilith felt it too."

This caused the two to be shocked with Vali asking, "What the—did something happen?!"

"JUST CALL THE OTHERS!" The Dragons shouted

"Okay! Okay!"

They then woke up every single ally that they could find, they then commune at the VIP Room, where many of the members of Team DXD are now meeting with three teams including the Occult Research Club, Vali Team, Brave Saints, Team Journey of the West, and Hero Faction.

"Ok, everyone! We are here for an urgent meeting." A Blonde priest said to the other teams, "Apparently the Red Dragon Emperor and the White Dragon Emperor as well as Ophis and Lilith has sensed something amiss in the Dimensional Gap."

Rias Gremory the redhead girlfriend of Issei then ask, "What do you mean by that Lord Dulio?"

"You see when I heard this me and Ajuka Beelzebub got a look at the gap, and we saw that something was about to go through it."

This caused the members to be shocked with one of the blonde girls named Le Fay asking, "But what kind of being would have that much power?"

As they continue to talk about this, The doors open up to reveal two Fallen Angels running towards Team DXD, "Everyone! We have news!"

The Green haired man Ajuka asked, "What is it?"

One of the Fallen then answered, "We have detected a huge portal opening outside the Hyoudou Residence!"

Issei then stood up and said, "Then we need to investigate it now!"

"Issei…" Rias look at his boyfriend

The others then nodded with Kiba one of the blonde dudes saying, "I agree with, Issei-kun. We need to go outside to see the cause of it now!"

The Team then agreed with this, with Dulio saying, "Well then let's go everyone!"

3rd POV

Outside the Hyoudou Residence, Kuoh Time

2018 AD

As we go outside the residence, a huge purple portal is now opening up in the sky. As the members of Team DXD exits the House. They are now in shock at what is happening. With Akeno the black haired girl asking, "What is that?"

"Man, that ship's size sure rivals my Ryuuteimaru…" Issei muttered.

"I don't know…" Ajuka answered the Half-Fallen Half Devil girl, they then saw the Storm Border coming out of it. This caused the whole Team to be on guard with Ddraig, Albion, Vritra, Fafnir, Arthur who is a blonde man with glasses, Le Fay, Bikou, Another blonde Girl named Jeanne, A gray haired man named Heracles, a girl wearing Chinese robes named Zhuge Liang, and brown haired named Perseus are now suffering headaches.

Vali and Issei then checks on them with Issei asking, "What happened, Ddraig? What is happening to you all?"

"Partner! Something or someone on that ship is affecting us!"

"Are you sure?" Vali interjected.

"Yes, we're sure!"

Suddenly an owl came out of the ship, with it approaching them as it stops. Team DXD are now curious at the creature with a white haired cat girl named Koneko stating "Is that a mechanical Owl?"

The owl's eyes glowed as it projects an image of Ritsuka wearing his Decisive Battle Mystic Code and Mash wearing her casual clothing.

"Hello is anyone there?" Ritsuka asked.

Issei and Rias look at each other as they moved forward, with the latter asking, "I'm Rias Gremory and this is Issei Hyoudou… Who are you two? You are trespassing into Gremory Territory."

Mash then replied, "Sorry about trespassing Rias-san. My name is Mash Kyrielight and this is my husband Ritsuka Fujimaru. We came from the Chaldea Security Organization. We came from another world."

This caused Team DXD to narrow their eyes, Issei then asked, "Umm… Tell us what are you doing here?"

"And we are here because we are chasing a group of vampires in this world. As well as saving Humanity." Ritsuka added.

This caused the others to be really intrigued, especially the Vali Team, and the Hero Faction. Suddenly Ddraig spoke to the two, "We've got a question for you two?"

"A voice? What is it?" Mash asked.

"Why is it that we sensed King Arthur and other Mythological figures in your ship?" Albion asked.

This caused Ritsuka to chuckle at this, with Ddraig asking, "What's so funny?"

"Well, you're gonna find out later." The owl then stopped projecting and went back to the Storm Border.

Author's Notes:

And that's that guys!

NOTE: This is originally one long prologue, but I decided to make it short and leave the rest of it as Chapter 1 since It doesn't feel like a prologue anymore.