A/N: Thanks to Boyzilla for his Digital Human Series, which inspired me to finish this.

The following was written before the release of Fate Extella: Link. Its story isn't taken into account.

The following is a five chapter written out form of a Challenge/Writing prompt for anybody to take on. For more information see the authors notes in the bottom.

I witnessed a sky of red as far as the eye could see. Red vectors veered into the sky with no distinguishable pattern. Immeasurable in number, impossible to even comprehend. Such was how alien and unnatural the object was.

Suddenly they paused.

One moment what spread like an unstoppable plague, suddenly locked into place. The stillness passed, and these vectors moved once more. The movement was different this time, for rather than flowing outward, the vectors retracted upon themselves. This action too, was unnatural. Physics demands that matter cannot exist in the same space at the same quantum state simultaneously. However, as these vectors continuously retracted into each other, they did just that as they focused into a single "blade".

Then the "blade" was swung.

"ENUMA ELISH!"

And reality broke.

Mare Aurum, the Capital of Roses. This great capital was the centralized power of SERAPH lands. A reproduction of Rome from the Pax Romana era combined with Chimeric Lunar Sea aesthetics, it was place of great artistry and architectural ingenuity. Roman coliseums, stunning waterfalls, gardens of beautiful roses, and ferocious statues depicting lions scattered the city. At its core was a Roman palace gilded with royal hues. Intricate patterns of gold and crimson riddled its rooms and halls, all of which resided under an ocean-like, clear blue sky. This was the headquarters of the Sovereign of the Moon Cell, owner of the Regalia.

Just moments ago, this utopia was obliterated. In a clash between Gilgamesh, the King of Heroes and agents of Velber, the Umbral Star, the reality marble encompassing Mare Aurum was rended apart, and all that was left of the great capital were desolate ruins. All over the rest of SERAPH, smaller skirmishes were commonplace. Servants, powerful cyber frames containing the souls of legendary heroes from Earth, led their forces of spiritron hacker Wizards, NPC's, and attack programs against the Anti-Cells of Velber.

"This was too soon."

Hakuno Kishinami voiced her thoughts as she ran through the ruins that littered the area. Carefully avoiding the scattered debris, the Sovereign of the Moon Cell somehow kept her pure white dress in pristine condition as she made her way to a familiar portal.

"Umu! Only several weeks after we stopped Archimedes' plan too! It's much too soon!"

Behind Hakuno slightly trailed Saber, her true name Nero Claudius Caesar Augustus Germanicus, voicing discontentment with the situation as she held the silent and frowning Altera in her arms. Despite the dire situation, the blonde emperor kept her revealing red ballroom gown just as immaculate as her master's.

"Such a sudden attack too! It's a miracle Velber offended the King of Heroes enough to allow us time for your retrieval, Goshujin-sama!"

At Nero's side was Caster, the fox eared Tamamo no Mae wearing blue traditional witchcraft clothes accenting her tied up pink hair, who held a small fire in her hands to provide sight for her master.

Passing through the gateway, Hakuno came across a familiar sight. While she was more intimate with the room through the inherited memories of her body, the final stages of their previous campaign led the current iteration of Hakuno into the Zero Dark's throne room. Once the headquarters of Altera when she functioned as a tool of destruction, this now abandoned room would serve as a worthy base of operations for the ongoing emergency. While most of the Zero Dark was to never be set foot in again, sentimentality demanded Hakuno to at least maintain the throne room. The throne itself was serviceable, despite its dreary appearance, and this description matched its surroundings. Hints of orange were plastered around the room's primarily gray walls, with cubic structures of the same coloration floating about.

Taking Altera from Nero's arms, Hakuno sat the beauty on her lap as she took a seat upon the cubic throne. The silent child's eyes darted around the room as terminals flickered to life around her Master, hands danced in the air around her. A grim expression overtook Hakuno's usually stoic face as she read the details before her out loud.

"Velber has taken over 97% of SERAPH in the hour since it arrived. Our citizens have mostly been evacuated thanks to the Servants, but they are getting boxed in and are on the verge of deletion."

"Ninety… seven… percent…" Nero managed to whisper, visibly shaken. She shook her head, and returned to her normal grandiose tone. "No matter, now that we have reestablished a central command,
the stage is set for our grand comeback!".

Tamamo moved to her Master's side, blatantly pressing herself against Hakuno. Normally such an action would result in Nero's protest and Hakuno's fidgeting, but given the severity of the situation, it was ignored. Peering into the terminal screens herself, Tamamo's eyes narrowed.

"Many Servants have fallen, but most of our generals are on the field with Karna-san leading the remnants. We've lost many spiritron hackers and our attack programs our nearly wiped out." The fox Servant continued to scan the data and clicked her tongue at her final finding. "And that red Archer is still missing."

Hakuno frowned before speaking up. "Archer has always disappeared for days at a time, it's not his fault that his habit lined up with an attack nobody could have predicted."

"Even so, he— ".

Tamamo was interrupted by the sound of a familiar malicious laugh. Just the very thought of its owner induced rage into those listening.

"Of course you rabble would be here. How typical of humanity. Such despicable, emotional, irrationality. Such useless sentimentality. These flawed traits led you here, and these flawed traits herald your destruction".

I held Altera closer to my chest as a familiar figure moved closer from the depths of the Zero Dark.

Archimedes, vassal of the Umbral Star.

This man was the one who orchestrated my separation in the previous conflict, and started this war against Velber. Under the guise of the maintenance engineer of the Moon Cell, he led me to the chamber of Titan Altera, where I was forced to separate myself into the three facets of Hakuno Kishinami.

The Mind, who stood by Saber.

The Soul, who stood by Caster.

And the Body, who learned to love Altera.

These three factions entered a war that devastated SERAPH, and in another reality they undertook mutual destruction. Following the Body and Altera's defeat of the White Titan Sephyr, they both began to fade away into deletion. With the destruction Altera's mainframe, she could no longer stay materialized and crumbled away, thankful for the Body being her ephemeral dream.

Resolved to create a future where Altera's dream continues, the Body recombined the broken Regalia and searched for a solution. It was then she realized Archimedes fail-safe. Before each Quantum Timelock, Archimedes would slide out of a reality where he failed to destroy both the Earth and the Moon Cell, and slide into another. For the Body, the Quantum Timelock occurred as Archimedes set his plan in motion, so she couldn't physically slide back and stop Archimedes before everything fell apart.

The Body did it anyways. The last-minute calculations of the Moon Cell proved it was possible, but at a great cost. Sacrificing her life to deletion for the sake of the woman she came to love, the Body faded away, sliding her memories to the Mind of this reality, the basis of which eventually reformed to become me.

With this inherited knowledge, we stopped the destruction of humanity, saved Altera from her fate as Velber 02 through rebirth, and delayed Archimedes until the next Quantum Timelock. And if the data that the Moon Cell is feeding me is correct then—

"You're too late. You came here to safely slide, didn't you? Well Velber timed its attack with the Quantum Timelock. It's over! This is the end for you, and for the Moon Cell," Archimedes cackled after dissecting what he assumed was our plan, even as Saber and Caster took protective positions in front of me.

Caster responded by moving her hand to her mouth. "Oho? Speaking so high and mighty little mathematician? Do you not see you are outnumbered?"

At her side, Saber puffed out her chests in absolute confidence. "You will fall here vile Archimedes. The curtain shall not close on us yet, for this is merely the opening act! Umu! We shall defeat you in a manner worthy of my Praetor's thunderous applause!"

And I would give it too. If Saber and Caster finished Archimedes here, I would give them all the applause they want and more. But nothing is so simple when it comes to agents of Velber.

In my arms, Altera pressed her back uncomfortably hard into my chest. Looking down on her face, any attempt I was going to make to soothe her stopped in my throat as I saw Altera's expression. I expected her beautiful face to be stuck in fear or nervousness, but reality didn't hold either look.

The entire time since her rebirth, Altera has always had a look of innocence. Gone was the oppressive air surrounding Hero Altera as she dealt destruction to all that faced, and all that remained was what she always dreamed of.

Joy. Curiosity. Wonderment.

But for the first time in weeks Altera's eyes were narrowed. Caution occupied her features, and her lips set into a tight frown. My mind went back to those memories of the Body who witnessed this expression before. Altera was scared, and she declared why with the parting of those frowning lips.

"They're here."

Almost immediately, two figures blurred into existence from seemingly nowhere and my mind went into disarray. The feeling of sheer wrongness that they emitted permeated the air. Even Saber and Caster stiffened in my view, clearly feeling the power that they emanated. The figures were clearly humanoid, but nothing else painted them as human. There were no discernable facial features, or any features at all for that matter. Covering every inch of their bodies were pitch black cubes. These cubes had scattered orange grooves reminiscent to rivers of molten magma. Their inclusion into the bodies were not neat, and cubes jutted out of seemingly random parts of their bodies.

"Due to the failure that was Velber 02," Archimedes started clinically as he stared dispassionately in Altera's direction, "the Umbral Star learned its lesson. Let me introduce to you Velber 01 and Velber 03, complete with upgrades that include complete and absolute control over their minds. We won't have any more failures. "

Two more… there were two more just like Altera. Despite being locked into role of destruction incarnate, two people who could have had hopes, dreams, and misgivings about their appointments are now converted into… into…

"You turned them into slaves!"

I couldn't hold myself back as I yelled that statement out loud. Even my servants looked surprised at my lapse in keeping my cool.

Archimedes scoffed in response. "We turned them into something better. Powerful beings without their budding emotion induced irrationality. They are now ruled by the logic that is the Umbral Star."

I wanted nothing more than to argue, to rage against this heinous crime against humanity, but I knew that we were in trouble and I had to find a solution. Back when Saber and Caster teamed up to fight Altera, their combined might could do nothing but barely hold against her magnificence. Where Saber and Caster exhausted both their prana reserves and stamina, Altera stood tall without breaking a sweat. Against two enemies potentially even more powerful than Altera ever was, we stood no chance.

I'm not so sure if the reborn Altera can even fight, especially without the Sword of Mars. We had never tested her combat prowess, content with allowing her to enjoy the wonders of .PH. I personally sealed the terrifyingly powerful Sword of Mars away in Titan Altera's old room in the hope of her never needing it again. She should be living a life of wonderment, not fighting. Besides, Archimedes and the Anti-Cells stood in the way of that cavern, so the option was out the window.

I focused my thoughts, thinking back to what Archimedes said. He told us our plan was to slide into an adjacent world line in that pretentious tone of his, but that was never really our plan. We thought to use the Zero Dark as a staging point to retake SERAPH, but maybe there is something else we can do. If Archimedes really does view sliding as a threat, then there must be another option we can take in that train of thought. But he said it himself, Velber timed its attack with the Quantum Timelock.

My research during the Holy Grail War told me about how the Moon Cell exists as a powerful observer of Earth. It is nigh omnipotent, as it observes the state of the planet and all its people faster than every yoctosecond. This observation transcends spatial boundaries, glimpsing into the possibilities across the Kaleidoscope. But as ridiculous as the Eye of God's observational capabilities are, it is not all powerful. It cannot feasibly keep track of every budding reality that originates from all the decisions made within its observational bounds. The solution was the Quantum Timelock. By instigating a continuous cut off point known as the Quantum Timelock, the World was able to cut off any realities that strayed too far from the average and normal state of the world, and the Moon Cell cut those unsupported world lines from observation. The culling of these unstable realities allowed for the observational prowess of the Moon Cell to continue without expending too much energy.

Sliding works within this principle. Due to the Moon Cell's observance of all realities past the previous Quantum Timelock cut-off period, it's a simpler matter to slide a person into their respective counterpart in another reality.

But this method won't work for us. No matter what reality we slide into, the Quantum Timelock occurred after everything started falling apart. We will always be stuck in the same situation, no matter what point in a timeline we go.

If only we could slide anywhere, at any point of time, then we could—

…

I tapped into my connection with Saber, Caster, and Altera as their Master.

"I have a plan, but I need you all to buy me time. What I'm about to do needs my complete concentration."

The three servants sent back messages of acknowledgement across the link as Altera got off my lap. Immediately I focused my mind entirely on the Regalia adorned on my right ring finger.

"I don't know what you're planning, but I already told you it's useless. Velber 01 and 03, kill these pests."

Just as Archimedes finished uttering his orders, the world around me exploded into combat. With the little attention I could spare away from the Regalia, I watched as my Servants valiantly fought. Saber fought with the ferocity of a lion as she swept Aestus Estus in beautiful arcs that would make even the muses shower her in praise. Caster wielded her mirror with practiced elegance and grace, casting spells of unimaginable firepower onto her opponents. Even Altera joined in, clearly still a powerful Servant as her fists struck true with ridiculous power.

It was not enough.

While Archimedes only stood back to observe the unfolding battle, the numerical advantage could only help for so long against such powerful opponents. Altera in particular looked frustrated as she could not be of exceptional use without her Sword of Mars, and her proficiency with her fists doesn't come close. Both Velber 01 and 03 struck devastating blows with their own weapons, unrecognizable due to their adorned cubes. In a few scant moments, both Saber and Caster were battered and exhausted while Altera stood protectively in front of them while sporting a myriad of cuts and bruises herself. In front of them, the two instruments of destruction prepared to land their finishing blows.

My concentration broke as I cursed at my own powerlessness. My Servants, the most important people to me in the world, were about to be cut down in front of me and I could do nothing about it. My Servants, who shower me with unconditional love and who I love deeply in return. My Servants, who were about to die for their Master with no regrets.

Two unidentified weapons were raised.

I cried out in despair.

My tumultuous mind subconsciously raised my arm and my Command Seals glowed crimson.

"PLEASE SAVE THEM!"

A flash of red, and out of nothingness two beings flashed into reality.

A flurry of exchanged blade strokes was followed by a cacophony of explosions, and both Velber 01 and 03 jumped back in caution.

The figure on the right nodded to the one on the left. "You were right to pull me from my battle. If I was unprepared, this exchange would have spelled my doom."

"Of course. I suspected something like this might happen and made preparations. My thanks for your assistance Artoria."

"Think nothing of it Archer."

I gaped in disbelief at my hand, of which lacked two Command Seals, and then upon the two newly arrived Servants. The original reason I didn't call for the assistance of more Servants with my Command Seals was because they would be instantly cut down against this caliber of opponent if unprepared. But if Archer was ready…

I tapped into my Master-Servant link once again.

"Thank You."

Both Artoria and Archer turned to me and smiled.

I recognized both of these Servants, and I was ecstatic at their arrival.

I've seen Artoria throughout the last campaign on SERAPH as she acted on the the Moon Cell's behalf to prevent its destruction, and after that conflict, every time I entered an all you can eat buffet. The once and future king of Britain held a regally beautiful face similar to Saber but with a much sterner personality. Dressed in a blue dress adorned in armor, Artoria Pendragon stands as one of the most powerful Top Servants as the wielder of Excalibur.

By her side stood Archer. This Servant claims to have no name, but there is something about him that is extremely familiar to me. He worked as Saber's second command in the previous conflict, and was a resourceful Servant who seemed to be prepared for every surprise. He contrasted Artoria with a dull red mantle over black body armor, with his tanned skin similarly contrasting his white hair.

Archer was always one to be prepared for anything and disappeared regularly. And if he said he had been making preparations, then this moment was exactly what his disappearances were for.

Despite the unexpected intrusion, Archimedes' features retained their smug expression. "What good will two more Servants do in the face of Velber's emissaries. You have no chance of ever—"

"Oh spare me the bravado Archimedes, "Archer smirked, holding his right hand out as began to trace a sword. "I'm more than familiar with how you operate. That's why I made sure to prepare for this moment when I suspected you were up to something."

Making his way towards Altera, Archer took slow and deliberate steps as the once herald of destruction had her eyes glued to the nameless blade he had traced. Both were silent as the nameless Servant presented her the sword handle first. Altera grabbed a hold of the sword and held it close to her chest with a smile. And at that, it entered a stunning metamorphosis. Rainbow light sprung from her Crest of the Star, interacting with the blade. Fully coating it, it swirled until finally disappearing, revealing a familiar weapon. Sporting a massive handguard and an ethereal rainbow blade, the Sword of Mars' appearance was accompanied by a crushing pressure of sheer power.

A short moment later, Altera pointed the sword of the original God of War at a now grimacing Archimedes. "With this sword I will cut you down, dog of Velber. No longer am I your slave of destruction. For my Master's sake I shall protect this ephemeral dream."

"It won't make a difference."

As if on cue, the throne room once more dissolved into frantic battle. Altera lead the charge with renewed vigor. Five Servants clashed with Velber 01, Velber 03, and a now fighting Archimedes. Once more we held the numerical advantage, and now it had more value.

Inwardly, I grinned at the development but I knew deep down that we still had no chance to win. Even with the Sword of Mars back in Altera's possession, we had no way of defeating Velber 01 and 03. But I knew that wasn't my Servant's goal. They understood I have a plan, and all they are doing is ensuring I have the time to enact it.

I won't let them down.

I closed my eyes and reentered a state of deep concentration, connecting to the Moon Cell through the Regalia.

The reason why world lines were removed from the Moon Cell's observational scope was due to evolving into something so radically different, that these aberrations no longer lined up with the common course of human history. The past could have played so differently in these worlds that they were near unrecognizable in comparison to my world. The Moon Cell's processing power is enormous, but it had to cut off outlier observation.

Cut off observation, not delete.

Just because the Moon Cell no longer observes many possible realities, doesn't mean they no longer exist. And just because the World isn't supporting these realities anymore, doesn't mean something else in those worlds can't support themselves either. No matter how powerful the World is, it can't destroy an entire universe, not if it supported itself. If a reality exists where Velber still hasn't found us, then there was still a chance. That means if we're able to pinpoint of it, we could still slide. It wouldn't remove the root of the problem, but at the very least both this iteration of SERAPH and this reality can be saved.

I scrambled all the available resources of the Moon Cell into finding another reality that met only two requirements.

{SCANNING…}

The first was the existence of the Moon Cell. Even if I or anyone else that lives on SERAPH doesn't exist in that reality, sliding operates through the transmission of data encompassing all involved parties. All of our memories, abilities, and most importantly lives, will carry on in that new the Moon Cell.

{POSITIVE RESULT FOUND}

{Deny}

The second requirement was a Moon Cell not yet under siege by the Umbral Star. Velber attacking the Moon Cell is an inevitability, but as long as we could buy enough time to prepare for this catastrophe, we still have a chance of victory.

{POSITIVE RESULT FOUND}

{Deny}

The problem was just finding a single reality took a frustratingly long time. These worlds are cut off from observation, so the Moon Cell no longer knows "where" the reality was. The Moon Cell has to check every combination of "coordinates" to search, and those realities found must be screened by me for those requirements. Every single one I've reviewed so far hasn't match up with my conditions. I've even came across a world where the Moon was completely shattered!

{POSITIVE RESULT FOUND}

{Deny}

I began to get nervous. If I didn't find a reality that worked then all of this would have been for noth—

{POSITIVE RESULT FOUND}

{Accept}

There! I found a reality that works! I don't have time to screen it for anything other than those bare conditions though, my Servants can't hold forever. I can feel them siphoning magical energy as some released their Noble Phantasms. Although weakened, they still stand. I need to move on to the next step immediately.

If I were to only slide the Moon Cell and its inhabitants, the Earth below would still be destroyed by Velber. Post-apocalyptic or otherwise, I can't, in good conscious, be responsible for the deaths of those few that still live there.

My solution to this would be to forcibly slide Velber with us into this new world line. That way the Earth here remains untouched, while we still have a fighting chance in repelling the Umbral Star. The only problem is that forcibly sliding the entirety of SERAPH and Velber would cost so much power that the Moon Cell would be nearly bled dry of energy.

With the unimaginable amount of data being sent across realties, something is bound to be lost on the trip.

But that's a small price to pay for a second chance.

{Initializing function Slide…}
{Encompassing Serial Phantasm…}
{Done}
{Encompassing Umbral Star…}
{ERROR: ACCESS DENIED}

No! We've come too far! If I could just focus all of the Moon Cell's processing power for a moment…

{Code Cast: Hack(8589934592);}

I made the smallest window for entry for a brief nanosecond. Was that enough?

{Encompassing Umbral Star…}
{Done}

Perfect! Velber never expected me to try something so crazy!

{Destination Set}

{Execute? Input Yes or No}

I could hear Archimedes yelling in the background, likely having been alerted by Velber. But he didn't matter anymore. Every preparation is set, and nothing could stop me now.

{Yes}

{Executing Slide…}

With this, we have a fighting chance.

And my world burst into data.

Far removed from even the nigh infinite Sea of Stars is the traverse between worlds. An endless void of iridescent colors filled with a "nothingness" that would crush any ordinary being. The crossroads of the Kaleidoscope where all world lines are somehow connected. A space of scattered debris drifting aimlessly. A place known to some as the Dimensional Gap.

A stream of data suddenly shot through this multicolored void, passing through any physical obstacles unabated. Information composed of both the Moon Cell and the Umbral Star traveled towards its intended destination quicker than even the most perceptive of Servants could follow. Invisible to the eye, no ordinary being could possibly interact with the data stream.

The Great Red is anything but ordinary.

A red dragon of monstrous proportions. Two titanic sets of wings flap with commanding force. A massive horn resides on his snout completing this imposing visage. The True Red Dragon God Emperor. A Dragon among Dragons. The Apocalypse Dragon.

Out of pure instinct, the Great Red swept a gargantuan talon at the sudden appearance of the data stream. He damaged part of a data packet before stopping himself from destroying more. The Apocalypse Dragon gazed on the fleeing data, his mind occupied with what he was seeing.

For he was the Embodiment of Dreams.

He thought of the dreams he had glimpsed. The dreams of heroes from every origin imaginable fighting for glory and their desires. The dreams of villains from every conceivable background struggling to achieve their goals and obtain their wishes. The dreams of humans from every nationality forcibly changing the world to obtain their paradise. And the shining dream of a Digital Human who waged war alongside her Servants simply for survival and happiness.

The Great Red's gaping jaws let out an uncharacteristically pleased sigh.

"Ah, what a wonderful, ephemeral dream…"

Important Authors Note: Everything past this line are Authors Notes.

Welcome to the Moon Cell Sovereignty! It is a fully written initial prompt that will clash the Fate Extra and High School DxD Universes. It was originally going to be a oneshot, but the entire thing (Which isn't fully finished or edited) clocked in at over 25,000 words. All that's left is to finish the ending then edit it all to publishable quality. Expect 5 full chapters. To be honest, I mostly like my work in Chapter 2 and onward, but I had to set things up somehow.

Now I decided to change the format from last time. For people who didn't read the ending Authors note in A Wild Card, the second chapter of full authors notes for prospective writers of the prompt/challenge came as an unwelcome surprise. So, I decided to split it up and put the notes relevant to the chapter at the bottom of each.

So here are the authors note for prospective writers:

1. Prompt/Challenge

Although the full thing is going to be 5 chapters long, those chapters are a prompt for prospective writers like you! I don't have the attention span to write a full story. I mean it took me over a year to finish what I have so far, and I don't even have the ending ready. The general prompt is this:

Due to unforseen circumstances, a Hakuno led Moon Cell Sovereignty has found itself in a world still in the Age of Gods. With mythological factions pushing their own agenda, a mysterious group of terrorists called the Khaos Brigade rising from the shadows, and the threat of the Umbral Star ever looming, it's time for the Moon Cell to go to battle. To arms Servants! We face the monsters of this world!

That's sort of a poorly worded version of it, but the basic gist is that I wanted the full strength of the Moon Cell to fight some Mythological baddies in the DxDverse. Since it is a prompt, you do not have to do everything I do. In fact, go right ahead and throw out everything I've written to push your own story following the basic idea. No need to follow what I've written. The purpose of this is to give you ideas so that you can write your own DxD and Extraverse crossover. All I ask is for a little credit given in your version of the story.

2. Fate Extella: Link

So as of the writing of this fanfiction, Link has not been released. Maybe one day I'll change the prompt to be in line with whatever is released, but for now this is the final product. If Extella Link makes some of what I'm doing irrelevant, feel free to change it.

3. Altera's Sword of Mars

If you are confused about how a nameless traced blade became the Sword of Mars, Altera has the ability to turn any weapon she touches into the Sword of Mars. I know I've read that somewhere but I can't find the ability on the wiki, so just take my word for it.

4. Invasion of the Umbral Star

In this story, Velber attacked extremely early after Archimedes was stopped. I don't really have an explanation for it, just that this is the reason why this story diverges into the DxDverse. Rather than dispatch Anti-Cells into the Solar System again, it decided to send itself to deal with the Moon Cell itself.

5. Adjacent World Lines

So the idea of me writing this prompt out was to figure out a way to get the Moon Cell into the DxDverse. So I decided that when the World prunes world lines, they aren't explicitly erased, but instead no longer supported. It would eventually die out and be unable to branch out further. But what if something in that world line was able to support itself. It isn't observed by the Moon Cell and supported by the World anymore, but it is still there, and is still reachable. The reason it can support itself is a spoiler for chapter 4, but know I do have a reason set up. I had to have a reason for a world so drastically different from Extra to exist, and my solution was a pruned world line.

6. Quantum Timelock

Not much to say here except it's a plot device that keeps Hakuno and pals from just going to the past in the same world line and actually preparing for Velber. Just a reason for desperation. Plus it makes strategic sense for Velber to attack at a time most inopportune for the Moon Cell, where it can't revert damage done.