Cosmic Catastrophe

In the Great Tomb of Nazarick, there was this moment of silence and tension that could be considered as the mourning over a certain being. It was like that they had lost the most important part of their existence. For every servant of Nazarick, they were bounded to fulfill the needs of their master, the guildmembers of the Nazarick. It was how they looked upon themselves.

But now...?

They were feeling the abandonment of the last Supreme Being, the only one who stayed longer with them compared to all the members of the guild. Yet it was not enough to break them into tears. There were times when the Supreme Ruler of Nazarick went to the journey of the New World without telling the servants at the first place. It was this reason for why they were not breaking into tears. However, there was a slight difference now...

The usual expressions of Lord Demiurge was not as enthusiastic as it was before. His mind didn't stay at one place for more than an hour. The same went to every Floor and Area Guardians of Nazarick. They were feeling lonely for some reason, like they had lost the most crucial part of their existence, the true mind of Nazarick itself.

Albedo sighed nth time and wondered where her beloved had gone. The reports of Demiurge were full of speculations with no concrete basing at all. She wanted an accurate piece of information, than the precise form of hope, that her master was still out there. He might be on an entirely different planet, stranded there to check upon something else.

After all, the grand plan of the Overlord of Nazarick was hard to figure out. His mind reached far into the future as he had already planned 100 millenia ahead of everyone in the guild. Even the combined intellect of the 4 greatest minds of Nazarick was capable of understanding his 8,000 years of future. Therefore, hoping to understand their master was a futile effort.

Every time they felt that they were close to unsolve the mystery of their master, he would end going to initiate another plan of his, which would end up destroying their whole mind. It was the most terrifying aspect of his master, which they were afraid of as well as they were amazed of.

However, she was the Overseer of Nazarick whose job was to administrate the sacred sanctum of her beloved and to also maintain the peace into the Sorcerer Kingdom in his absence. Well, atleast they had something to do in their empty time.

Albedo put another bundle of files in the piles of files. As she had become very old, her intelligence had skyrocketed in these millennia of constant workload. Whether she would be thankful of it, or not, it was still a good thing at best while managing the realm in her master's absence.

"Finally, the budgets of the nest 60 years are complete. Now, I need to energize myself with them..."

She said to herself and went to her room which even the maids were not allowed to come and clean. This room held the secrets of the Prime minister of the Sorcerer Kingdom, which contained the huge number of plushies that looked similar to that of Ainz in appearance.

She smiled at them and greeted them, her own harem of Ainz.

"I have arrived everyone."

Adding the fact that in just few decades, the magic casters of the Sorcerer Kingdom had found a way to record voices and images of others as well. They manufactured cameras and other tools to store information of the world. Of course, Ainz let it to exist in the common folk, as this was harmless towards nature and easy to mass produce as well.

Each of these plushies were capable of several different types of voices.

"Hey Albedo, you look amazing as always!"

"Come here my dear wife, let's make some babies."

"I love you Albedo~."

"I will always be with you."

And many others started to speak using their voice recorded spells. Of course, Ainz had said all those words to just make her happy, but little did he knew that Albedo had recorded those words and made a combination of different words that sounded like it was Ainz who was speaking to her.

There was a matter of silence from her side, until she prepared to dive into the huge pile of her beloved to regain her motivation to work. However, a [Message] was enough to break her stupor. It was from Pandora's Actor.

'How strange. He never talks much to me unless there is something important to share.'

She thought while wondering about all the possibilities for Pandora to even message her. As she took the  Message from him, she heard just one sentence that filled her with the stamina far above the combined presence of all of her plushies.

Not wanting to waste anytime, she activated the Ring of Ainz Ooal Gown and teleported to the Vaults of Nazarick.

(Scene Change : Ainz POV)

There were many stuffs, belonging to his friends, were lying on the table. Something he felt nostalgic about,  was the gears of his friend Touch Me and Ulbert, which he used up in the battle against the Dragon God.

While rummaging with all the gears, he found the divine gears of his friend Shizuten Suzaku, the Nue diviner of the Ainz Ooal Gown at its prime.

Taking the items of Suzaku, Touch Me and Ulbert, he prepared himself for the battle against the Alien Spider. He gave the commands to his "son" for the further possibility of him not coming back.

"While I am away, make sure that nobody would end up destroying or harming themselves. I don't think that I will be unavailable for sometime."

"But Father, you have just arrived now. Why do you want to leave so early?"

"Because it is necessary. I may even perish into this, but if that thing found his way to Nazarick, then I must do my best to defeat that monstrosity before something like that happens."

He rejected his "son's" persuasion to stay at the tomb,but Ainz was no fool to just waste his time.

Thanks to his Discernment abilities, Ainz had found the mechanism of how that spider's powers worked at the first place. The spider created the crystalline field which covered the information of past, present and future of the planet it was standing upon, then it would replicate the said information from the very deepest corner, until he felt the satisfaction to be capable of performing the said feat.

On the other hand, if the spider reached Fuyuki City, then it would end up absorbing all the information regarding the Holy Grail and wish for himself to become the victor of all the grail wars. It wouldn't stop just there, the spider would also found his wish and access to his homeworld as well. Therefore, it must be eliminated.

"I must go right away. Take ca—"

"LORD AINZ!!''

A scream that sounded unrealistic to exist in the Vault, caught his attention right there. Before he could see the source of this scream, he felt a deja vu of falling down on the floor... again.

"Lord Ainz! Please don't leave us this time!"

"A-Albedo?!"

"I won't leave your side no matter what! Even if you order my execution, I will not change my mind!"

"...."

Not knowing what to do with the current situation, Ainz stared at his creation whom he couldn't read. There was the situation of that spider reaching the Fuyuk city, if he didn't leave, then it would be too late.

"Albedo, if I won't go there, then it will be too much for Nazarick to handle. The situation is worse than you can imagi—"

"Then take me with you! I will rather die with you than just waiting here for you. So please,... let me..."

The teary face of Albedo was too much for Ainz to resist. She always had her trump card to use upon him, the Puppy Eyes of a succubus was the most lethal weapon that even Ainz had nothing to shield from.

'Where did she learn this skill? Is it because of that little imp?!'

Ainz had his doubts that the golden haired princess was teaching her new ways to persuade him for fulfilling the hidden agenda of her own.

"Ughh, fine then! You are coming, but you better equip your items right away."

"YES!!!"

The sudden shift of her emotions were enough to confirm the doubts he had about that demon princess.

(Scene Change : Pacific Ocean)

The largest ocean of the planet Earth, had become a wasteland of constant bombardments from the two Grand Servants who were attacking at the alien lifeform with massive barrage if attacks upon it.

While Solomon was trying to change its attention on himself, Hassan was putting the concepts of Death upon him. Unfortunately for them, the spider was keeping up with both of them without showing any signs of exhaustion and scratch. Just annoyance of these two that put the spider at halt.

However, this was all according to the plan of Solomon, who was just awaiting for the next Grand Servant from the Counter Force itself. Just stalling it for here was enough for the time required for another grand summoning.

But as the time went, they felt that the alien was just toying with them and manipulating for itself. This changed the course of plan and so, the Magus King took it upon himself to take the risks. He decided to let the spider to go back at its usual route.

In the Pacific Ocean...

While descended upon the water surface, the sea floor crystallized and water froze at its lowest temperature which even surpassed the possible temperatures into the human world standards. The visitor from the Oort Cloud was imposing its own reality upon the planet Earth.

'This is not good! We must change our tactics again. If this goes on then the world will not survive at all.'

He stared at the 5th Magic user, the red haired girl, who was reversing the time and causality around the spider at near instantaneous speed.

There was also his servant, Zelretch, who used his 5th Maguc to draw magic energy to boost their reserves at the sane time. Both of them were changing the tides of battle at a massive scale. But that was still not enough.

Unfortunately, that's all they could do until the Counter Force found another Grand Servant to send here.

"Hmm, what's this feeling? Another 2nd Magic user?"

Solomon saw at the nearest island, the presence of two powerful beings draped into darkness. The first one was possibly a undead mage with a massive shield and a golden talisman. The other one was a woman in dark armor who was emitting the immense evilness with her presence alone.

He felt alerted, until a huge magical circle formed of unknown language. Solomon had never seen this alien looking language in his entire life and the woman was staring directly at the spider. He couldn't read their faces, he just prayed that they were not here to cause another problem here.

Suddenly, a chill rand into his spine. The Magus King felt the huge amount of flux of mana around the skeleton mage, who formed the crimson wards around him. There was the feeling of hopelessness that filled the atmosphere, but he didn't pay any attention  on him. It was perfect for them not interfering right now.

However, he heard some chants from tge skeleton who was making some gestures that seemed like a part of a ritual.

"O curse of the World, I call thee for this new day. Bless thou revenge upon this enemy of mine, with ..."

He kept chanting for more than a minute, but Solomon had no time to understand it. He couldn't lose his focus right now.

He didn't care what that armored woman was doing as well, the field of magic formed up around here was covering the entire planet.

'It is a defensible skill!'

He realized what she was doing there. Feeling calm that they were on their side, he also helped them as well. Through the Fire Accumulation magecraft and the Speed  Acceleration magecraft, Solomon shot a barrage of millions of fire balls at a speed that surpassed  the speed of sound, which attracted the attention of the alien... again.

However, at the moment, he was going to make use of his another magecraft, the ocean erupted the huge number of watery tentacles that were attacking at the spider. Through the Boosting magecraft, he boosted the parameters of the tentacles as well. The clouds above were raining the lightning down there, instead of raindrops. The weather was not something he had seen as a natural phenomenon. It was like they had sentience of their own. However, none of them reached to the ORT, as he deviated the spatial dimensions around the trajectory of attacks. That was why Solomon had used the Spatial magecraft to let his attacks reach at the alien lifeform.

Sighing in relief, at the change of pace of the ORT, Solomon started to prepare his another attack that he was thinking of —

"[Grand Catastrophe]"

(Ainz POV)

The World Disaster job class had a very powerful spell that could even destroy the indestructible items like artifacts. The spell demonstrated the cursed firm of World leaves who were devoured by the World Eater at the time of creation. This job class was just a manifestation of all of their hate upon the unfortunate soul.

And the spell was known as the Grand Catastrophe.

By using up 60% of one's total MP bar, the caster could damage far greater than that of normal Super Tier Spell. The damage could be further increased by the addition of extra mana as a fuel to boost the destructivity of the attack.

The entity called ORT had a huge HP bar, with even greater damage stats. In terms of comparison of between all the stats, the attack stats alone put ORT anything above in the entire world. But so far, he toyed with everyone, which was a blessing upon them as well. And they let it play with them as well.

"It's your time to put Aegis skill at work. I am sure that the spider will again deviate the attack. Your Aegis has a similar abilities of the attack deviation kit, right?"

"Yes. I have total 19 skills regarding the attack deviation, reflection, refraction, reverberation and transference based skills to maintain my line of defense. With the talents and martial arts, I can further enhance its AoE effect and permanence of the said skill to protect us. I am now capable of handling any Super Tier spell without wording about the number of times, they are used upon me. However, the world class spell that you are activating, is capable of bypassing my complete Magic Immunity."

Albedo stated her skills and the upgrades on each of them. She was sure that it would please the beloved of hers, but the next words of Ainz shocked her.

"I don't think that will be enough against him."

"What do you mean, my Lord?"

"I have a hunch that the spider is also capable of summoning it's identical twin from another parallel reality and double its own power. There is also the possibility of it having an auto-resurrection skill that can infinitely resurrect it as well. That's why, I don't want to kill this thing. Our best bet is to send it back to its normal state."

"Ah, apologies Lord Ainz."

"It's fine Albedo. We just need to weaken thos thing and let her do the thing as we have planned before coming here."

Nodding at his words, Albedo activated her defensive skill all over the island and let her master do his part.

In the worst case scenario, Ainz would die right here, but in the best case scenario, both Albedo and Ainz would die together. And Ainz was sure that she would choose the latter scenario.

"[Grand Catastrophe]"

The spell that could surpass even the Super Tier spell, had unleashed its explosive effect upon the ORT.

Before coming here, Ainz used his own 2nd Magic to amass a huge humber of magical energy from ethereal and Astral planes of existence. Hid current MP could be counted into exponential numbers, which was over

... 10¹⁰⁰.

Even Ainz had never dreamed of this much mana inside of him and he was still collecting even more from all the planes, whether elemental, causal, imaginary, physical, spiritual and so on, he needed the power that could one shot the ORT.

Taking risks right now would only bore defeat for him and Albedo.

And so the spell directed upon the ORT, exploded like 3 supernovas dud, where all three of then were concentrated at one place. Blazing with the light that blinded the entire solar system for the next 5 seconds, the spell finally vanished away. Leaving an empty space around the place where he was standing, or swimming in case of it being a Pacific Ocean.

But Ainz just didn't stop there, he also used the diviner skill of his friend Suzaku to restore the lost history of the planet. As a level 100 diviner, Suzaku could bypass the scry immunity to manipulate or restore the distorted part of the history as well.

The only reason why Ainz could even use the skill set of his two friends, lied in his talent that he stole from Antilene. With their skills, he could take the base where ORT was standing upon.

The very history of the world which the alien was using to his advantage in here. As well as its connection to the Oort Cloud too.

For next few minutes, he didn't feel the creeping presence of ORT around the Pacific Ocean.  Everything was deathly silent and the other servants and Magi were staring at him in bewilderment.

They also waited for the arrival of Oort Cloud's Ultimate One, but there was no sign of it. It was like that he just vanished from its spot.

"What are you waiting for? Reverse the time around the world, I am not sure what you are thinking right now, but thus is the best time to do this."

(Aoko POV)

The Blue magic user, otherwise known as the 5th Magic user, stared at the complete annihilation of the once proud alien spider called ORT.

She had no idea what kind of magecraft was that, or if that was even a magecraft at the first place. The sheer destructivity of the attack was blinding.

But she didn't lose her sight from the spot of the ORT, as she wondered about the possibility of the alien being alive, until she heard from the another 5th Magic user.

Snapping back to reality, she understood the implications behind his word.

Not wanted to waste the efforts of the skeleton mage, Aozaki used her access to temporal flow over the universe, which had a drastic side-effect upon the natural reality as well.

Reversing the cause of all the damage brought upon by the Ultimate One, they reached to the place where it was sleeping.

"Zelretch, please check the presence of the spider."

She requested to the Wizard Marshall to check upon the status of the Oort cloud's alien. Though she could not see his emotions, the calm and collected response of Kischur was more than enough to relieve a sigh of relief.

"Finally, this all ended. Thank you for— Huh?! Where did they go?"

Thanking the two saviors who came to help in the time of troubles, she could no longer feel the presence of the two visitors.

"Aoko..."

"Hey Zel, where did they go?"

She asked to him, thinking he could find them as well, but he just shrugged off her question and went to meet Solomon.

"Hmph. How arrogant of him!"

She huffed at him and watched for him. Wondering where he could go atleast.

"Someday, I will find you..."

(Scene Change : Throne Of Heroes)

A realm where the legends were never forgotten by the World itself, as it was the plane of existence which existed beyond the confines of Space and Time.

An archive that recorded the data of every single heroic creature into its arsenal. This was the realm of information that hosted the world of heroes.

Regardless of past, present and future, this world had access to all the parallel realities of the the Gaia and its possible realities.

And amongst all these legendary spirits, a legend of Ainz Ooal Gown had been added, albeit without any conscious mind.

Thus, there lied the possibilities of it being summoned as a Pseudo Servant.

However, the question was... who could fulfill the criteria for this pseudo servant?

Author's Note : Thank you all of you to follow this crossover. I know that it is kind of small, but it is Fate Zero after all, I can't stretch it any longer, unless I go full FGO here. And adding the bunch of servants who were going to be killed by the ORT would not be something I like to write. It feels pretty bad and waste of time.

If you have any questions regarding this fanfic, then ask away. I will answer them with the best of my knowledge and capability.

Good Bye.

Note : If you any critics then I can answer them with the best of my ability. I may launch the second part of the series if adventures of Ainz Ooal Gown into the multiverse of Fate.