I do not own any My hero Academia Content that is put into this fic. I only own the characters/O. C's I created.

Prologue: The Beginning of Chaos part 1 (Re-Edit) (Sorry for any confusion about re-uploading the same file a couple of days ago.) Slow progress updates

Meanwhile in an underground lab…

"So, I feel like it can be said that this place is going to shit." Said a man leaning against a cracked wall. All around him and the person he was talking to the place was falling apart, equipment is broken, bodies were under rubble, and fires breaking out everywhere. "Yeah, the boss is going to flip."

"Mach, if you're not going to help salvage what we can from this project, then leave dammit!" Shouted the man wearing a mask and suit as he frantically was downloading stuff to the flash drive.

"Would if I could King but I got orders to drag your ass out of here." Said Mach as he looked at a person in a high-tech cage. "What about the kid?"

"Leave him, if our experiments went right, he'll survive this." Said King as he pulled the flash drive out of the computer. "All right, let's get out of here."

"Good I rather not…. Said Mach as He frantically was searching for something.

"Did you really just lose the key card to the door? Asked King in annoyance.

"No, I had it hooked to my coat this whole damn time, it must have got caught on something when this mess happened…" 'Knock, knock, knock.' Said Mach as he and King looked over to the cage and saw their "experiment," using the key card to draw their attention. "Oh, f… YOU IDIOT!? Said Mach as King yelled at him.

"How the hell did he even… it doesn't matter open the cage and get the key card." Asked Mach as King interrupted him.

"ME!? WHY NOT ANY OF THE OTHER PEOPLE HERE!?" Yelled Mach as he pointed behind him. King just gave him a blank stare and pointed in the same direction at all the bodies.

"Oh yeah, they're all dead." Said Mach as he rubbed the back of his head. "Can't we just break the door?"

"Did you forget who designed the door?" Questioned King. "Right… he still has those quirk-prevention gloves right?" Asked Mach as he finally went to the cage as a piece of the ceiling just fell behind him.

"Just get the damn key card!" Exclaimed King.

Mach finally got to the cage and pressed his hand on the scanner beside it. The cage opens with smoke pouring out from the cage and their "experiment" just standing there. "Well, the smoke-breathing theory works." Said Mach as he started to reach for the key card in the "experiments" hands. "That right be a good little pest and stay there." Mach finally got the key card out of his hands when King just noticed something horrifying.

"MACH GET OUT OF THERE!?" He screamed.

"Oh relax, he has the…" 'Clink.' Said Mach as stopped and looked down to see the quirk prevention gloves with skin coming out of them on the floor and then finally looked at the key card, the bloody key card.

Mach then quickly turn to punch their "experiment" in the face, when the kid grabbed the left side of his face stuck a finger through his eye, and pulled out with it. "AH, SHIT!?" Screamed Mach in agony as he held his face and fell to the ground. King pulled out a gun and started shooting at their "experiment" only for it to dodge all the bullets. The kid then started to transform with a thick blanket of darkness wrapping around his body. King then used his quirk to create a barrier to withstand what was about to happen.

The kid then screamed as powerful energy erupted around the whole room destroying everything around him except for King's barrier. As the dust finally settled King opened a shutter and looked around to see if their "experiment" was still around.

"Well, that's not good." Said King as he saw the destruction around him. Blood was showered everywhere around the room and a very noticeable hole in the ceiling broke through three floors.

"Hey, I'm still bleeding out here!" Screamed Mach holding his face. King just stood there looking at the remains of their "experiment." "Arth… I heard you." Said King as he interrupted Mach. "You got the key card?"

"Are you… yes, I have the damn key card!" Exclaimed Mach as he held it in his other hand.

"The hell got… you in a…" He started to say as King lowered the barrier to show the blood-covered room. "Oh, Splice is going to flip when she discovers that… I know and the boss isn't going to be happy either." Said King as he interrupted Mach once more as he handed him an eye patch. "That should help keep the bleeding at bay."

"Yeah, thanks." He said as he started to put it on not arguing with King. "Hey, at least we have an excuse."

"For what?" Asked King as he gave Mach a glare.

"We couldn't really predict that "he" of all people decided to show up." Answered Mach. King looked at him and what was left of the cage and the hole in the ceiling.

'I wonder did the kid really die, or did he live?' Thought King as Mach opened the secret door and as they left.

Above ground, 5 minutes before their "experiment" let loose…

"This isn't up for debate Toshi!" Screamed Nana with tears rolling down her eyes.

"But, Sensei, I can't just leave!" Screamed Toshi as he reached out to be grabbed by Grand Torino.

"This isn't up for discussion, kid.!" Exclaimed Grand Torino as he dragged Toshi off.

"Sensei!"He screamed as he saw Nana Shimura smile one last time as All for One powered his quirk to kill Nana.

'At least, he is safe.' Thought Nana as she got ready to block the attack the best she could before dying.

'Foolish woman, no matter how hard she tries to hide her successor, I will find him.' All for One thought. "Now it's time to… BOOM! Shouted All for One to be interrupted by an explosion happening beneath him and Nana. A torrent of black energy burst through the ground interrupting both attacks. The energy was so powerful it made a banshee-like scream as it pierced through the air.

'Is this All for One's attack!' Thought Nana as she looked at All for One. 'No, he appears to be as shocked as I am, and if that's the case what just released this energy!?'

'What is this!?' Internally screamed All for One. 'This isn't One for All, this is something different entirely, so who released this amount of energy.'

As the energy finally resided, they both had their answer. What appeared in front of them appeared to look like a man covered in darkness, his eye bleeding red, his teeth as sharp as daggers, wings that looked like they belonged to the Grim Reaper himself, claws and feet of a demon, and a cloak that hid the man face in darkness other than his eyes and teeth.

This man or demon then started to breathe heavily looking around at his surroundings. "Who are you?" Asked All for One. The demon man thing then turned to look at All for One, glaring him in the eyes not giving a response. "Hm, Nana did you really bring another innocent hero into our fated fight, have enough people died because of you?" He tauntingly asked. Nana still stood there in shock from the creature's appearance, but All for One's question finally hit her.

"What do you mean, you killed my husband, who else could you have…" It then hit her on what he meant, her tearing up, her fists balled up. "YOU BAST… hero?" Asked the creature as he looked at Nana interrupting her. She nodded at his response slowly and cautiously getting into a defending stance. The creature then looked at All for One. "Villain? "It asked.

"Why does it matter to you?" Asked All for One as he readied several quirks. "Surely, you must be one yourself." He said hoping to get a reaction. The creature floated they're then raised its hand toward All for One.

'Shit, I can't take two on one, not in my state!' Thought Nana in fear at the demon.

"So, you are a villain." Said All for One still holding onto the several quirks he was using.

"No." Said the creature. "Just another damaged innocent person from a tragic past." He said getting a rise out All for One. The creature then shot a shadow-like hand instantly severing the arm that All for One was using. All for One then screamed in pain as the creature then flew above All for One hitting him with a powerful kick and sending him hurling to the ground causing another black torrent of energy to appear from the ground. As it resided All for One was severely damaged, breathing, but damaged. Before he passed out from the pain, he had one final thought, 'What… is this… quirk.'

Back with Nana and the creature, the creature turned towards Nana. She instantly froze up and who could blame her, she just saw this thing take down a god in one fellow swoop. The creature then landed on the rooftop and said, "Help… me." Said the creature as the energy faded revealing a seven-year-old kid falling into the arms of Nana. She grabbed the falling child so he wouldn't get hurt.

'That monster was this kid's quirk!' She thought in terror. She then noticed a couple of things about him. His hair was long and black, he was taller than what he was supposed to be for a seven-year-old, he could easily be mistaken for a teenager, and the scars all the scars on the kid's chest and back just disgusts her.

"How could someone harm a child like this?" She questioned as she held onto the child and cried. At that moment she remembers something. "Toshi and Torino, I got to get to them, but where could they have gone." She pondered. She then snapped her fingers. U.A. that's the first place Torino would have taken Toshi. She then started to use her quirk and felt the immediate pain from her battle. "Shit this hurts, but I got to get this kid some medical attention and fast, but Toshi… cough," She said out loud to be interrupted by the child coughing up blood. "Damn, ok, the hospital first and then I'll call Torino."

At U.A

"I see, I am sorry for your lost, both of you." Said a mouse bear dog thing.

"No, thank you, for taking us in." Said Toshi. "I trust you'll keep our secret well, Mr. Nezu?"

"Of course, anything for the next Symbol of Peace." He said with a smile. "I trust you want some time to rest before you start teaching Young Toshi, Mr. Torino?"

"Yes, I do, I still can't believe you convinced me to be a teacher." Said Grand Torino holding his head.

"Well, it would look suspicious to the Hero Committee if I suddenly let two strangers use my school's facilities unsupervised, you wouldn't want me to get into any trouble, right?" Asked Nezu. Toshi and Torino could feel the terrifying aura coming off of Nezu.

"No, no of course not, we're asking so much of you as it is." Answered Toshi. As the conversation continued, Nezu's phone went off.

"Ah, excuse me, I should answer this." He said grabbing the phone.

"No problem at all will just… nonsense I will not allow a phone call to interrupt our meeting." Said Toshi as Nezu interrupted him. Nezu then picked up the phone. "Hello, Principal Nezu speaking… Ah, Recovery Girl didn't expect you to…" Nezu's tone then shifted from a cheerful tone to a serious tone. "Are you sure?... No, thank you, Chiyo, we'll be there as soon as we can." Said Nezu as he slammed his phone down on the receiver.

"Mr. Nezu is everything all right?" Asked Toshi.

"Oh, yes, everything is perfect!" Exclaimed Nezu as he opened a drawer from his desk and pulled out a rather big file.

"What student gave you that much trouble?" Asked Torino wondering if he was going to deal with said student.

"Oh, it's not a student's file, it's a missing person case." He said as started to shove it into a suitcase. "One that has eluded me for quite a while."

"And Recovery Girl found them?" Asked Toshi.

"Well, not Recovery Girl she's healing him as we speak." Said Nezu getting ready to walk out the door and then stop. "What are you two waiting for this includes you two as well."

"It does?" Asked Torino.

"Indeed, for you see a hurt hero brought him." He said as he turned and looked at the two. "And she is waiting for you two to arrive as well."

Toshi then shot out of his seat with tears rolling down his face and Torino couldn't believe what he was hearing.

"Nana's alive!" Exclaimed Torino.

In an undisclosed location…

"All for One started tearing the place apart you say?" Asked a man in a chair whose back was faced to Mach and King.

"Indeed, sir, we manage to save as much information as we could." Answered King.

"But not our experiment." Said a woman in a lab coat with her rose-colored hair covering a side of her face.

"Hey, it's not our fault that All for One decided to fight someone there, Splice!" Shouted Mach.

"You're lucky that I pitied you enough to even give you a new eye." Said Splice who was very annoyed.

"Enough!" Exclaimed the boss immediately silencing his subordinates. "All for One doesn't just attack someone for no reason, he must have found what he was looking for." He said holding a file in his hands.

"You know, it would have been great information if Priest's spy would have warned us so we could have gotten out of there with our experiment in hand." Said Mach scratching his face.

"I hate to say it but, Mach's right, why didn't Priest's spy send us information about All for One?" Asked King.

"A matter with Trickster and Nightingale came along so all of our resources were indisposed." Said the boss.

"What about Mob and Svikari?" Asked Mach.

"Handling an errand, I sent them on." He answered.

"Needless to say, you were screwed either way." Said Splice.

"I see." Said King looking at the flash drive in his hand.

"Something the matter?" Questioned his boss.

"It's nothing, sir." He replied.

"King, I know you all too well when you say nothing, it usually is something." His boss said with intrigue.

"Well, I'm still debating if he is really dead." Answered King.

"Oh, really." Said Splice as she walked over to King. "Cause when I sent Eve to go and double-check your story, all she found was rubble, a bunch of dead henchman, and the large amounts of blood from our experiment, so tell us, how do you think he's not dead?"

"Because I discussed it with Ace, and he agrees something's off." Answered King.

"Oh, that brat." Exclaimed Mach. "The hell does he know?"

"Tell me, King, I trust you had one of your subordinates on hand while you were at the lab, right?" Asked the boss.

"Yes, sir, I did." Said King as a chime was heard.

"And the results?" He asked. King took a moment before he replied.

"Well?" Asked Splice. Nothing came out of King's mouth. "Him and his damn mask tech." She said as she reached out for King's mask.

"All for One has been defeated." King finally replied.

"What?" Hissed Splice.

"I'm with horror movie reject, what do you mean he was defeated, if Priest's spy info was right the man is a god!" Exclaimed Mach.

"I'm just telling you what I was told." Said King.

"Well, she's got to be… who defeat him?" Asked the boss as he interrupted Splice.

"According to what she saw after everything cooled down, she doesn't know, she believes a woman named Nana Shimura." He explained. The boss then stood up out of the chair and walked to the wall he was in front of. He then pressed a button on the wall and the wall flipped over revealing a monitor with information on it being added at least every second.

"Then it's wrong." He spoke.

"It is?" Questioned Mach. "Then who else could have defeated him?"

"Someone who can kill a god." Said Splice with a smirk.

King then got on one knee and said, "Emperor, what you like me to do?"

"Investigate, leave no stone unturned." Said Emperor as he swung an arm out. "And Mach."

Mach jumped back in surprise got on one knee and Said, "Yes Emperor."

"Your request to get new members has been granted." He said which made Mach grin from ear to ear.

"And Splice." "I know my lord." Said Splice as she got on one knee as well. "I'll get started on Subject Beta."

"Good." He said as he smiled. "Let's show the world what a True Devil can do."