Spoilers from included and/or represented works abound. Please read this fiction carefully.
"We order you, the Sephirah, the Patron Librarians, to cease this!" Hoshimatsu commanded.
"Ugh! What're you doing!?" Netzach lashed out.
The Sephirah pushed the alliance away.
"I'm Elijah, nice to meet you." Malkuth identified herself as her past self.
"Lady Malkuth, why are you calling yourself Elijah?" David questioned. "Wasn't that your human name?"
"Kali, the Red Mist." Gebura identified herself as her past self.
"This is ridiculous." Phoenix/Ryuichi noticed. "Those robots with human organs are identifying themselves as if they're still living as humans!"
"For example, Tiphereth is Lisa." Phoenix continued. "Now she's going to call herself such."
"Hello, I'm Lisa-" Tiphereth identified herself as her past self, but is silenced by Hoshimatsu.
"I'm Giovanni-" Netzach identified himself as his past self, but is quickly slapped by David.
"Ayin, it's me, Benjamin!" Hokma called Ayin, former identifying as the latter's friend and former's past self.
"What!?" Ayin is shocked.
"Your desecration of reality won't go unpunished." Binah spouted the words. "And we're gonna tear you off."
The Sephirah morphed into their respective form, themselves mixed with the form that needed to be suppressed, complete with armaments and details based on the latter forms, and black sclera all around. Their outfits morphed as such as well, thus matching their meltdown monstrosity.
Malkuth sprouts appendages on left shoulder and right eye, and flaming horns; Yesod spawn appendages on his tail, and a big flair; Hod sprouts a right wing and wears a spiky mesh mask on her head; Netzach sprouts mossy appendages on his left shoulder, and wearing a crown made of green roses; Tiphereth wearing a piano-themed yellow dress partly based on her old outfit from her time at Lobotomy Corporation; Gebura wears a corrupted version of her outfit as Red Mist and dons a burning mask with a single eye in it; Chesed gains a dark purple tail, a crystalline blue right wing, a smoky (and cloudy) white left wing, and red with green tint appendages on the back; Binah wears (the corrupted version of) her Arbiter outfit in full (complete with appropriate mask); and Hokma wears an holy robe with graphics (looking) like shattered glass on the back.
"Heh, you think you're gonna save them!?" Hod then left an evil laugh.
"I'm gonna kill everyone that counts." Binah declared.
"God damn it!" David is frustrated. "We cannot..."
Roland put on himself as the Black Silence, and took his stance, with Ayin taking a scientific holy cross... whatever.
"What're we waiting for!?" Ayin told everyone. "Everyone, suppress those robo-avatars!"
"Die, you pieces of shit!" Tiphereth attacked.
So they fought back against the Sephirah, to save them from the insanity they turned into. Gebura and Binah, having already has access to their prime potential as the Red Mist (like Gebura's been as Kali) and an Arbiter respectively, proved to be an extra layer of difficulty, as does the violence as the result of the meltdown. They're tough, and the suppressors struggled to keep up and progress.
Phoenix and Maya/Mayoi ran away and reported nearby people about the incident.
"Everyone! The Sephirah, Patron Librarians, are suffering meltdown!" Phoenix and Maya shouted continuously. "Please help us suppress them! Go to the Misty Meadows to learn more!"
Minutes passed, the Sephirah are starting to tire out the suppressors. Thankfully, the rest of the new Investigation Team arrived in scene, as well as Kiana Kaslana.
"Who are you?" Malkuth noticed.
"Great Sephirot! We're going to save you!" Kiana charged ahead.
The Sephirah are real tough. It isn't very effective on the suppressors' part...
Not long afterwards, Hokma tampered with temporal points, using the power of his clock.
"Fuck!" David activated Sandevistan.
Time dilates, effectively slowing the Sephirah all down. David took the staff, Reality Render, and stabbed it down to the ground hard. This caused an energetic shockwave, greatly beating the Sephirah.
"Ahhh!" "Ugh!" "Kyaa-!" "Bueh!" "Uwaaah!" "Urgh!" "Augh!" "Ueeh!" "Urk!"
The Sephirah are knocked down, and are restrained by clones of Naruto Uzumaki.
"No! We can still destroy!" Hod complained.
"I'll kill you no matter what!" Gebura yelled it out.
David casted lightning from the staff, electrocuting all the Sephirah, defeating them and have them suppressed. They returns to normal.
"Uhhh... What happened?" Malkuth is fuzzy.
"Lady Malkuth!" David took Malkuth.
"David...?" Malkuth clears up. "Did I... cause any harm?"
"Don't worry, we're fine!" David reassured. "Besides, thanks god you're back!"
"Ugh... we had a meltdown..." Gebura is fuzzy.
"I knew I could just retreat..." Netzach have had it. "Sorry, I hurt you all of the sudden."
Phoenix and Maya ran to the Sephirah, finding out that they're suppressed.
"Thanks goodness! Our Patrol Librarians...!" Maya hugged.
"Oh well..." Binah isn't amused.
"I'm sorry for trying to kill all of you." Hokma apologized. "Qlipha got us."
"It's ok. Never really your fault." Jumpson reassured.
The island shakes again.
"What's going on?" Malkuth noticed.
"Oh, it's 8:30 A.M." System No. XX reported. "The schedule start of voyage."
"Lady Kansatsubi, the island is moving?" Malkuth is surprised.
"So... it's time to move?" Roland questioned.
"Wait... everyone, go to the Bridge!" Angela ran ahead.
"Bruh..." Everybody followed.
The ship containing the island is moving, bringing all its contents out.
"Everyone, the destination: Night City!" Geno announced, then pushed the accelerator.
The ship dashed in hyperspeed towards a crack in the sky. Entering it, the island transported.
Meanwhile...
"You're... Angelica, the original Black Silence?" The bookhunter asked a white-haired woman.
"Yes, I am." She confirmed. "What do you want?"
"What's this world's knowledge?" The bookhunter asked.
"Apparently, they do cybernetic implants." Angelica replied.
The remains of the cybernetically-enhanced place, Night City, with the people from other worlds sitting in. Angelica and the bookhunter are among them.
"I did not know the truth about the Librarian of Death until before I killed her." The bookhunter told Angelica. "What about yours?"
Angelica tells the bookhunter that she has been affected by the Pianist in District 9, turned into a monster by Argalia (the Blue Reverberation, fellow Color Fixer), returned through the Library (somehow) only to be forced to fight her husband (Roland) again, and... stuck in the remains of the Night City.
Flashback...*
"Darling... Why would you break our promise and get along with this machine!?" Angelica is in tears. "She allowed me to die twice!"
"No, it's not really what you think!" Roland defended himself. "I only went to that machine because you were dead..."
"No... you broke our promise and left me to become a monster myself!" Angelica refuted.
"How did this happen?" Angela is confused. "She's dead, and yet...!"
"This isn't the first time our new methods caused some reality-breaking results." Roland noted. "As for my beloved..."
cue the fight between the couple*
Back to the present...*
"My heart broke. I actually had to beat him in order to escape." Angelica continued. "He doesn't really seem to be the same anymore. And to make it even worse, he even took my title. Black Silence, he became. Preception-Blocking Mask and the gloves, he took it all."
"Maybe that's because you have been killed for so long, it gave him time." The bookhunter responded.
The island manifested as a crack in the sky (Sideways Rift), then formed to appear on top of the ruins. Angelica and the bookhunter saw it, and flabbergasted.
"What in the City is this!?"
The island floats down, tilts safely on the tip. Smaller airships emerged and landed on the ruins. One such airship landed near the two.
"Wait... it's...!" Roland recognized Angelica. "Angelica! It's me! Your honey!"
Angelica is shook by the recognition. "What...?"
Team Lobotomy-Ruina lands down.
"I remember you. Getting killed by an Abnormality, then get killed as a monster by us. Then misunderstood us." Angela recognized Angelica.
"Hello, Librarian of Death." The bookhunter greeted. "I'm a child with no name, once booked into the-"
"Library since vandalized by a reality-breaking threat?" Hod guessed.
"H-h-how!? How did you guess that so spot on!?" The bookhunter is surprised.
"We meet again, both of you separately, but now together." Angela welcomed. "I am Angela, the Head Librarian."
"You!" Angelica blocked Angela. "Not only you got my life ruined, but you had some strangers punning my name in! Explain this, 'Angelicarmen'!"
"Dear Angelica! You were dead, and I found a life partner who just happened to be an artificial librarian who atoned!" Roland explained. "She regretted letting the Abnormalities rise up uncontrollably, including allowing that incident that killed you and drove me to revenge that has since ceased!"
Roland and Angela hugged Angelica (who looks like Fixer Angela with white hair and blue eyes and black attires) in genuine caring, after all that happened in their world involving them.
"Vengeance isn't always the best option. Sometimes, it make things worse." Roland told Angelica. "I'm sorry your death means it's not possible to fulfill our promise, but even then, I could've lost myself avenging you. I'm sorry for all that happened..."
Angelica just... cried. The bookhunter feels pity towards the threesome.
"Don't worry, we're not the people who would discriminate you." Angela reassured. "Especially not your loving husband, who still secretly cares about you even after he moved on with a machine like me."
The Sephirah calmed Angelica down. Various crew landed in the meantime.
"Night City. The dragons and Infinity Ultron and friends did so much damage..." David remembered.
"Alright, that's a mission for Captain Velvet Meteor!" Captain Velvet Meteor landed.
The alliance sets foot in the remains of the City of Dreams. They saw a desert around the remains of the Arasaka Tower: the Arasaka Desert.
The alliance and those stuck all walked to the desert.
"Why did it turned into desert?" Adam Smasher asked.
"Good question, Smasher." Kogoro replied. "Reality warping events created this dessert around the broken tower."
"It's still 2077, and things has changed too much." Johnny Silverhand noted.
"The Rift Goddess is definitely to blame." Chizuru Urashima noted.
"Doctor, any further leads?" Silverhand asked.
"The 13th Crystal." All incarnations of the Doctor revealed. "The crossing crystal, the second great crystal. We currently have other great crystal, the Zero Point one."
"Marvel, DC, Capcom, Bandai Namco, Sega, Square Enix, Koei-Tecmo, Super Hero Time, IF-NI-Heart combo, Super Smash Bros., Zero Point, Glitch Productions, and that." Reiji noted. "All 13 crystals... they're based on emblematic-"
"No sir! All sixteen!" The 12th Doctor corrected. "OASIS-based one, Nexus one, and the great third!"
"That nexus crystal is a companion to the Zero Point one, due to its nature." The 13th Doctor explained. "Therefore, it applies to every single mostly non-digital worlds."
"OASIS-crystal, on the other hand, applies to every single digital worlds, OASIS included." The 14th Doctor continued. "It is the digital counterpart to the Nexus crystal."
Meanwhile, near the fallen tower, a swordwoman named Artoria Pendragon is protecting the crossing crystal.
She saw the alliance approaching the tower, so she took her stance.
"Here goes nothing...!"
A while later, everyone arrived. Artoria told everyone. "I have a crystal, and I'm tasked to protect this crystal."
"You're Artoria Pendragon the Saber, one of our clients!" Reiji and Angela recognized.
"Who is she?" Isaac Clarke has no idea. "I have no intention to fight her, but I don't know anything about her."
Cross-trivia: Artoria Pendragon (アルトリア・ペンドラゴン), Class Name Saber (セイバー), is one of the main characters of Fate/Zero and one of the three main heroines of Fate/stay night. She is the Saber-class Servant of Kiritsugu Emiya in the Fourth Holy Grail War, and Shirou Emiya in the Fifth Holy Grail War.
"Thanks, man in red." Artoria thanked Deadpool.
"Bruh, how many man in red mean? Daredevil? That Flash? Even Aka Manto?" Deadpool replied. "But you're welcome, miss Saber."
"You're Saber, just like me!" Touma Kamiyama (Kamen Rider Saber) noticed.
"Protecting a crystal?" Reiji questioned. "You mean the second great crystal: The crystal of crossing!?"
"Uh... what?" Artoria is confused.
"Why else are you here?" Kogoro asked Artoria.
"The three crystals created from Zero End. They has been used to cast out creatures to the targets." Artoria explained. "This was part of the Empress Zero's plan, because the worlds survived."
"She seized... the last three crystals?" David questioned in response.
"Various worlds got ruined in the first week of desecration because of the usage of those crystals." Artoria continued. "My world was one of them. My Master..."
"Zero End, you said?" David asked back.
"Zero Point being destroyed... we should call it the Zero End." Artoria suggested.
"We dealt with the Zero Hell and the merger, and survived it." Reiji noted.
The alliance explained everything that has happened so far, since the true destruction of Zero Point (Zero End).
"Zero End, then Zero Hell, followed by... Zero Crash." Artoria pieced it together.
"Miss Saber, we'd need you to join us." David offered Artoria. "You are protecting a crystal from the evil forces of sort from the Rift Goddess."
"The Rift Goddess is the true identity of Empress Zero." Ren Fuji refreshed it. "Yesterday, she regained her original body back."
"Also, your existence is very prominent, as far as we're aware of." Reiji continued.
"Welcome to save the reality." David shakes hand with Artoria.
"For sake of my Master and my world... I'll gladly accompany you!" Artoria accepted the offer. "But are you my Master-"
"We have to hurry. If we don't, the Rift Goddess will complete her object and become a corrupt omni-deity!" Goku yelled.
Joining the alliance, and to be supported by CXA, Saber gave them the crossing crystal.
"Crystal get!" The announcer exclaimed.
"Someone said that we got a crystal, and I find it... suspicious." David noticed the voice. "I already recorded that a few time already, but later!'l"
Everyone entered the fallen tower, and fell down the massive rabbit hole.