This fanfiction is a multi-crossover with Warframe and MHA, in a world that shares history with Demon Slayer, Jojo's Bizzare Adventure, Hellsing Ultimate, Metal Gear Rising: Revengence, Durarara!, and AU Genshin Impact. Expect heavy spoilers from some of these series as MHA takes place after the events of many of them.

This is my first Fanfiction and a fairly ambitious one at that, so any feedback will be appreciated! I hope you enjoy.

Ch1: One final deal

Haylee groaned…

The last thing she remembered was that the Lotus had just killed Ballas. And then… the hole in the Void appeared, rocking the sentient mothership. They had stopped Praghasa from consuming the sun, but now rather than devouring it as fuel for the mad Orokin executors' genocidal journey to the Tau system, something else was happening.

Where was she?

Haylee struggled to her feet, looking around for the Lotus. Looking around, she saw she was in a bright, white space that seemed to stretch out endlessly. The only things she could see were a large four armed statue and a panel showing the Lotus attempting to hold back the tear in reality.

"Lotus!" she yelled, running toward the rectangle. She could see more of the scene before her, including her own unconscious body next to the Lotus.

"Hey there kiddo." Haylee froze. She knew that voice. After all, it was her own. "Didn't expect to see me again so soon, did you?" She turned to face the thing that wore her face and spoke with her distorted voice.

But what she saw wasn't what she was expecting.

"You look like shit," she retorted to the eldritch being. While it wore her form, it was covered in glowing cracks, with skin flaking off to reveal a glowing being underneath. Through all of its evident pain, it still had its signature smile.

"I wouldn't be so smug about this kiddo. I've come to collect. You owe me," the being said, sitting down at the foot of the statue. "That foolish Orokin has torn down the walls between your reality and the Void."

"Isn't that what you wanted? To be free?" She narrowed her eyes at the creature. Did it want her body? It had been held back by Rell for centuries. There were plenty of other Tenno it could have tried to take over. She didn't have the strongest mental fortitude, but there were far weaker bodies it could have tried to take. Was it the fact that she was the one who had made the deal to seal the fates of all the Zariman survivors?

The creature coughed, and instead of blood, it was a pool of liquid energy, the surface shimmering like a nebula. "I wanted to sample the fruit of your reality, yes, that much is true. But I can't have any fun in a reality that will soon no longer exist."

She narrowed her eyes at the entity. "Explain!"

"Well, oh debtor mine… I'll make this explanation quick, because we are both almost out of time. You, my finest child, were to be my body in this world. I didn't give you all that power for nothing." It flashed her a grin before continuing. "The other children were… backup plans, in case you expired before you were powerful enough to contain me."

Haylee had always known that making the deal with the creature was a mistake. Reminiscent of the old stories of making a deal with the devil, everything had a price. But in the end, she did what she had to do to ensure her and the other children's survival.

"Unfortunately, my existence is tethered to the place you call 'the void'. If it ceases to be, I will as well."

She narrowed her eyes at it. "The Void has opened plenty of times before. What makes this time any different?

"Normally those portals are stabilized. They let things in and things can come out of them. These portals, either through Ballas's lapsing sanity or the damage caused during your battle with him have destabilized the portal in a way even I could not predict. The Void is colliding with your reality, and the more energy coming out of that portal, the more rifts that will open. It has already begun."

[Cetus, Earth]

Quill Onkko Primary watched over Cetus. Narmer's forces had fallen back after the Tenno freed the Unum. Cetus would recover. He could already see the coalition of Corpus, Grineer, Tenno, and Ostrons freed from their veils working together to clear the debris and dead. This alliance would soon shatter, as it did in all futures.

He looked toward the sun. And there, there the Tenno would fight. She would die or she would succeed. Then would come the Zariman from the depths of the Void, as it should be. After that… Wait. Why couldn't he see the further possibilities?

Thud!

The Quill turned slowly. A condroc, dead, falling out of the sky. An eerie feeling washed over him as he heard several more thuds as more of the birds fell from the sky around him. Suddenly he was overcome by a splitting headache, and he could hear the voice of the Unum screaming in pain. The ground began to shake and cracks in reality began to form in the sky.

He could feel the timelines of the universe fracturing, possibilities eroding into nothingness. Terrified screams could be heard throughout Cetus as the horrors of the Void bled into reality. Gunfire erupted as several Corrupted emerged from one rift, gunning down Grineer and Ostron alike.

Onkko collapsed, watching Lua in the sky above begin to implode on itself before he took his last breath.

[Uranus]

Tyl Regor sat across from a child. A young girl with blonde hair, around their teenage years. They were also a Tenno. Their warframe lay slumped against a chair, a red and purple Mag Prime. Their alliance had formed out of necessity to survive against Narmer, and nothing more. He wasn't completely shocked at their appearance, having heard rumors from those who had served aboard the Kuva Fortress of the true form of the Tenno being children.

However, he never expected to form a sort of strange camaraderie with them—. One of those responsible for butchering the future of the Grineer, his tubemen. They had survived down in these labs for the better part of a few weeks, fighting off Sentient and Veiled forces side by side.

Morgan stood up, having finished tinkering with his Knux gauntlets, and wiped the grease stains from her glasses. "There ya go Regor. These should hit harder against those mucking Sentients." He looked at her, his face hidden behind his helmet.

"I do suppose that thanking you would be appropriate…"

Morgan stared at him, before chuckling. "I can never get a read on you, Reggie."

"Don't call me that, you brat!" he yelled in an annoyed tone. She grabbed some rations from a crate, tore the wrapping off and sat down, nibbling on the nutrient stick. Tyl grabbed his gauntlets off the table, throwing out a few test punches and flexing his fingers.

"Regor?" he heard the girl ask.
"Yes, child?" he responded, turning to face her.

"After all this is over, we will go back to being enemies, won't we?" There was a look of sadness on her face.

He stared at her for a few seconds. "Please, we both know that if the situation were anything else, I would have killed you when you found me. Especially after all you Tenno have done to my work, my tubemen," he spat with venom in his voice. "All my hard work to cure the Grineer, and you toss it away to help some parasite like Alad."

She thought back to the operation to stop the mad Grineer scientists, the 'Tubemen'— Vastly improved Grineer clones who had lessened the effects of cloning degradation. They were faster, stronger, and more durable than normal Grineer. The cost of those boons, however, was that all the Grineer produced by his treatment were extremely mentally unstable and violent. She was pretty sure Regor had subjected himself to the treatment, as well.

"What, and just let you make your people better at slaughtering and enslaving everyone who isn't you?" Morgan retorted, standing up and walking over to the Grineer scientist. She stared directly into his faceplate with no fear.

Why should he care about those wretches like the Corpus or the other lessers on other planets? They weren't Grineer, so they didn't matter.

"They are not Grineer, just inferior specimens. Utter skoom that deserves to be extinguished!" he shouted back, leering down at her.

She looked back at him with a mixture of anger and pity.

"Is that what you really believe, or do you just think that because you were engineered to?!"
Her eyes flared with the power of the Void, and he stepped back as a precaution. "You're just another number to the Queens. You're disposable—a weapon, just like we were for the Orokin! All you know is hate because that is what you were programmed to do! You haven't seen children slaughtered in front of their parents—"

She was cut off when Regor grabbed her with his oversized gauntlet and hoisted her up to meet him at eye level, and she felt a rib crack from the pressure. Maybe she shouldn't have made them so strong for him.

"Listen here, you sniveling little kuaka. I have neither the time nor patience to argue philosophy with you. I do what I must, not for the Queens, but because I have no other choice to save my fellow Grineer brothers and sisters. I don't care if the others don't see me as some sort of savior or hero to them, because we have no other choice!" He met her unwavering gaze with an unseen glare, rage brewing behind his mask.

"We all have a choice, Regor."

Every instinct bred into him was telling him to slaughter the Tenno. She was an enemy. She was not one of us. All it would take was a slash of his Ack, or he could crush her skull in his gauntlet and tear her warframe to shreds before she could revive herself.

'Kill her kill her kill her kill her.'

But something in the back of his mind was stopping him. Was she right? Impossible. The numbers didn't add up. He was part of the master race of clones bred to be superior, degeneration disease be damned. His grip loosened on her chest as he hesitated.

"Arrrrrgh!" He tossed her back down onto the floor, turning around to punch the nearest wall. The room shook with the force, leaving a large fist indentation in the metal. He withdrew his fist, breathing heavily.

Morgan struggled to her feet, feeling her broken rib burn as it healed. As she stood up, she felt reverberations in the Void. Something was wrong. One of the consoles in the lab began to blare an alarm.

"Bah! What now?" Tyl exclaimed in frustration, rushing to the console as the lab began to shake. He pressed a few buttons, pulling up a projection of the area. The alert was showing multiple Void fissures opening up in the facility. "Perfect. First we had to fight off Narmer, and now the corrupted have decided to show up," he hissed in annoyance. He pinched the air, zooming out on the projection, and what he saw caused his eyes to widen.

The fissures weren't localized to just the area around his laboratory facility—they were opening across the planet and even in its orbit.

"Hurk... Hurk... HurUUUUUAAAAAGHAGHUUUUUUH!"

Regor turned to see the young Tenno keeled over on her hands and knees and vomiting blood onto the floor. Her skin was deathly pale, and every so often, a static effect would distort her form. Even through all the pain, she crawled toward her Warframe, too weak to transfer to it over a distance.

Regor, without thinking, rushed to her side and lifted her up in his oversized hands, having forgotten that they had been at each other's throats only a minute ago.

"Regor…" she coughed, blood staining her chin. "The Void… I can feel it, colliding with our reality. It's going to kill us all."

Before the scientist could respond to that, a Void fissure opened up in front of him, and a Corrupted butcher leaped out, cleaver aimed at his skull. He didn't have time to dodge. A blow like that wouldn't have been fatal, but his guard was down. If any more Corrupted came through, then he was screwed. Maybe he could drop the girl or use her as a shield or

BWOOOM!

The Tenno had raised her arm and disintegrated the entire upper body of the butcher before it could land a blow on him. The move clearly took a lot out of her, with her left cornea having ruptured and blood leaking from her eye.

"AAAAAAAAAAAAAAAAAGHHHHHHH!" she screamed in pain, raising her palms and pressing them together, and the portal began to close, severing a Corrupted ancient's arm as it reached through the portal.

Regor was in shock. "Why? Why would you save me in your condition?!"

"I'm—cough—not going to make it, Regor. My powers are killing me." She winced, smearing blood on her face as she tried to wipe it off. "At least—cough—I can save someone before I die." She pressed something against his chest, an emblem from her suit. "Take this, and remember what I said. We all have a choice, just as I choose to save you now."

"What—" he started to speak, before the body of the girl began to glow in his arms as she focused her power, covering the shocked scientist in her Protective Sling. Her body began to disintegrate as she poured everything into her Vazarin ability, sacrificing her very life force to extend the duration of the protection.

"Survive," her voice echoed, as her body vanished in a shower of energy.

She sacrificed her life to save her once enemy. Why? And what was this feeling in his heart? From his nearly decayed tear duct, he felt something leak out, before everything faded to white.

[Haylee]

Through her connection to the Void, Haylee could feel the fabric of both realities crashing together. The nightmare realm of the Void's incursion against the physical world was tearing both apart, and she could feel the death of billions being caught between the collision of two places that were never supposed to meet.

"You've made your point. What is it you want? Will taking my body restore everything to normal?" she snarled to the entity.

"I'm afraid it's far too late for that. Even if I were to take your body, it would simply destroy it. You cannot handle the power of a Primordial such as myself. I offer only a fragment of myself. This universe is done for, and all I can do now is tear through the veil between worlds and move you to another," the creature explained, still sporting its signature smile.

"I imagine whatever entities lie on the other side will not be pleased by my intrusion, and they will kill me. I do not imagine that I will survive whatever action I take, so I intend for you to succeed me. You carry on my power in exchange for the lives of those that survive the journey between universes."

"And what makes you think I will accept?" she asked.

"Because I know your nature. You Tenno and your Lotus, working toward the 'greater good' as you call it. You will do anything to save as many lives as possible, at the expense of your own." It chuckled. "How amusing."

The blue-haired Tenno grit her teeth. The Man in the Wall was right—she had to try to save everyone, even if it cost her everything. "Do it. Save them. As many people as you can!"

It gave her a cheek splitting grin. "That's a good girl. C'mon now, don't keep me waiting. Let's shake on it!"

She took the abomination's hand, seizing up as she felt its power surge into her body before everything faded away.

She faded in and out of consciousness. Eyes catching glimpses of color too fast to comprehend.

"—ack of care led to"

"You are so concerned with or—"

"Dare to—"

"—have a family?"

She saw flashes of red, black, white, and yellow energy colliding, along with the dying screams of two powerful beings.

And then everything went dark again.

[Izuku Midoriya]

"The freak storm is expected to last overnight, so make sure to stay indoors. If you are trapped outdoors, then please seek shelter, due to the high winds and heavy lightning," the newscaster explained. "Experts are uncertain as to how such a large storm came to be, seemingly appearing out of nowhere. Could it be the work of villains? Some experiment gone wrong? Up next, our experts weigh—"

Izuku clicked off the television. His body ached after another long day of training, having hauled trash off the local beach for a few hours with a few breaks in between. He could tell the difference after only a few weeks of training, having lost a bit of baby fat and gained more definition to his muscles.

Not realizing it, he started mumbling to himself. He hoped that this unexpected storm didn't add more trash to the beach. All Might had told him that due to its location trash would come in from the sea had built up over the time, exacerbated by people using it as a junkyard. The storm was pretty strong from the wind roaring outside and the crackling lightning, which could mean that the ocean would bring in more debris—

"Izuku, dear! Dinner is ready!" His mother, Inko, shouted from the kitchen, interrupting his mumbling.

"Coming, mom! Just need to wash my hands!" he yelled back.

Hopefully he could sleep through this storm tonight.

[Toshinori Yagi]

"Ah, young Midoriya! Good morning!" Toshinori Yagi waved to his young successor-in-training. "I hope that storm last night didn't keep you up! You have another long day of training ahead!" He bulked up, giving the boy a quick thumbs up before shrinking down.

"Yes All Might-sensei! I got plenty of sleep!" he happily replied. "I already did my stretches too after I woke up, too!"

"Good work, young man! Wouldn't want to cramp up while lifting something heavy!" He smiled. "Oh, before I forget, I got you these!" He pulled out a pair of All Might-themed work gloves. "Can't have you getting cut up on a rusty piece of metal, now can we?"

He watched as his protégé took the gloves with stars in his eyes, bowing rapidly and telling him that they would be a family heirloom. Perhaps he should have bought normal gloves…

Midoriya had only been at his training for a few weeks now, but he had already made steady progress in Toshinori's 'Aim to Pass! American Dream Plan'. He could see the improvement through the effort the young man had put forth—muscles were becoming more defined, and he was looking less scrawny every day. If he kept it up at this rate, his body would be able to accept One For All's power just before the entrance exams!

He stepped out of the truck, just having returned from delivering another load of junk to the recycling center, and Toshinori took a moment to gaze over the beach. Thanks to Midoriya's hard work, there were now more sightlines to the shoreline. Some movement down by the waves caught his eye.

A blue-haired girl, around young Midoriya's age, was pulling some large objects out of the water. Was someone else trying to help clean up the beach? He squinted to get a better look, and his eyes widened when he realized what she was dragging out of the water were bodies.

Thank you to my beta reader Cygus Lorman. Make sure to check him out on Ao3. :)es.