"All Might!" Gamma 1 shouted as he saw the number 1 hero get sent flying, hitting the edge of the crater, and destroying it, causing the earth to shake. He took his blaster out to shoot a healing shot at All Might, only for All for One's black tendrils to shoot out of his fingers, and rush up at Gamma 1, far faster than before, and wrap around his blaster as well as his arm.

"What!?" Gamma 1 gasped.

SHRIRRRRRT!

And then in that next moment, Gamma 1's arm was torn off.

"Gahh!" Gamma 1 looked at his now missing arm, which was emitting sparks.

"That's enough of that." All for One said, as he brought Gamma 1's blaster to him, and crushed it.

"Gamma 1!" Gamma 2 shouted, before turning back to All for One with an enraged look. "You bastard!"

Gamma 2 charged at All for One, taking out his blaster and peppering him with shots as he rushed toward him.

All for One blocked the shots with his forcefield, and when Gamma 2 got close and was preparing for a punch, he slapped him to the side, sending him flying into the side of the crater, which practically exploded from the force of the android crashing into it.

BANG!

Suddenly a flash-bang sword slammed into the ground right in front of him, blinding him.

"Alright, I think I'm done with this now!" All for One said after restoring his eyesight. He was officially done with Sai now, and so he aimed up his arm toward the direction he'd detected Said earlier.

His sleeve puffed up, and black energy wrapped around it.

KRAKOOM!

All for One unleashed a blast of wind and lightning like a storm focused in one direction, that plowed through every building that got in its way.

They blast everything as far as the eye could see in that direction, utterly decimated. Just dirt and rubble.

"Well, hopefully, that killed her." All for One said to himself.

SHING!

All for One felt something stab into his back, and right through his heart.

The villain coughed up a bit of blood and turned around to Sai standing there, having used her portals to sneak up behind him and stab him through the heart, with the Dagger of Destiny.

"This is for my team! You bastard!" Sai growled as she dug the dagger into his back.

"Oh Ms Bura, it was your lack of understanding that killed your team in the end." All for One chuckled as blood spilled out of his mouth, and his body got progressively colder and heavier. "Caster wasn't exactly hard to spot as a traitor, if you'd just paid a bit more attention then-okay why am I dying!?"

None of his regenerative quirks were working to repair his heart, and he was starting to feel the power of the emerald fade, as his heart could no longer conduct its power. Also, he was dying.

Sai took the dagger out of his back, and backed up, allowing the villain to fall to his knees. "This dagger was made to kill people like you. You can't fix the damage. No matter how hard you try."

"Oh…clever." All for One then extended his arm and dug it into his own chest. "RAHHHHHHH!"

"What!?" Sai stepped back, her mouth hanging open in shock.

The villain then pulled out his own damaged heart, with the Chaos Emerald still inside of it. "If I can't repair my heart, then I'll just have to replace it!"

With his damaged heart taken out, a new heart was remade and all the damage was fixed.

"You-You bas-" Sai's curses were cut off, as she was shot in the chest, by laser beams that came out of All for One's eyes.

The former hero fell to the ground, blood leaking from her mouth.

"Finally." All for One sighed, as he looked at Sai's fallen body. Noting the lack of Chaos Emerald. She must have left it in her pocket dimension. I wonder if it will exit when she dies. Unfortunately, I can't stick around to see. I should leave before Midoriya unleashes whatever surprise he has in store next.

"Flash Fire Fist!"

FWOOSH!

Suddenly, an incredibly strong burst of flame came in from the side and burned away the arm All for One was using to hold the Chaos Emerald, causing it to drop to the ground.

All for One's eyes widened in shock, and quickly he shot black tendrils from his fingers, to pick it up, but he was tackled from behind by Endeavor, charging into him at full force, shrouded in flames.

"I won't allow it!" Endeavor shouted, as he used his quirk, to fly All for One into the side of the crater, dragging him through the ground.

"Endeavor!" All for One shouted out in rage, as the number 2 hero held him by the head, and dragged him across the ground, the flames being so intense that All for One had to focus his enhancement quirks into his regeneration quirks, to not get his head burned off.

"Did you think I would just sit by, and allow others to risk their lives while I remain on the sidelines!" Endeavor shouted, his flames exploding and burning even hotter, turning into a blinding white.

"GAHHHHH!" All for One had to focus even more on his defensive and regenerative quirks. His quirk! It shouldn't be this powerful!? How!? A Chaos Emerald!? No…it's something else.

XXXXXXXXXXXXXXXXXX

Back on that day, after Endeavor signed his custody away to Touya, things were wrapping up.

Touya has left, and Shoto and Fuyumi have gone back to their rooms.

Which left Endeavor and Izuku alone.

"Endeavor," Izuku said, getting the hero's attention and pulling him out of his thoughts. "I can't imagine the things going through your mind. Why would you do all this? What you're feeling. What you're thinking. But…it seems like at the very least, something hero-like, and something father-like…remains inside of you. Covered and suppressed by whatever issues you have. I may not like you, but I am a believer in second chances. Should you be willing to earn one? ``

Izuku then took out a Might Fruit and rolled it to Endeavor. "Take this, and when the time comes, prove to me, and to your family. That you're worth our time. Number 2 Hero. Endeavor."

XXXXXXXXXXXXXXXXXXXX

I don't understand anything anymore. It feels like I've been in a haze! Endeavor thought as he dragged the villain. What was going through my head? Why did I…why did I do what I did to all of them? I didn't WANT to hurt them so why? Did I really not care? Did I really not even notice? It's all so confusing…But I do know this. Right now, there is a threat in front of me! And it's my job as the number 2 hero, to burn it to a crisp!

All for One's sleeve expanded, and an explosion of wind knocked Endeavor back, off of All for One, and back into the crater, where he landed on his feet.

The villain quickly jumped back into the crater with him and looked at the spot where the Chaos Emerald was, only to find it missing. "No! Where could it have, that robot!"

Meanwhile, Gamma 1 was flying away, holding the Chaos Emerald in his one remaining hand and Said on his shoulder. "This is Gamma 1! I've retrieved the Chaos Emerald, and am now heading back to the Foundation!"

"Good work 1!" Dr. Xeno shouted exuberantly over coms.

Back in the crater, All for One was staring down Endeavor, with a glare so pointed it's a wonder Endeavor didn't die from sheer malice. "You damn heroes! I've had enough of this!"

The ground started to shake, and Endeavor wisely made the decision to jump into the air. He was just in time, as suddenly the ground shot spikes up at where he had been standing, which would have impaled him if he was just a second late.

Massive arms shot out of the ground, rushing towards Endeavor.

Endeavor shot small beams of fire from his fingertips, initiating his special move. "Hell Spider!"

The flame hero manipulated the beams and had them dice up the arms into chunks.

But no matter how many he cut down, more arms simply rose up and came at him.

"Tch." Endeavor changed tactics, and flew up higher into the sky away from the arms, before turning back down, and staying at All for One. "Flash Fire Fist!"

He shot down a beam of intense flames at All for One, forcing the villain to jump back and stop focusing on his earth manipulation quirk, to make sure he didn't get cooked.

All for One looked up at Endeavor, and fired beams from his eyes at him, which clashed with Endeavor's fire, and slowly but surely overpowering it.

"Grrrrrr!" Endeavor put everything he had into this Flash Fire Fist, but still, he could barely keep up with All for One's own power.

Fortunately, he wouldn't have to.

"Detroit!" Shouted out a familiar voice from behind One for All.

"What!?" All for One shouted.

"SMASH!" All Might came in from behind, and punched All for One in the back, sending him flying forward, skidding across the ground on his face.

"All Might!" All for One growled, as he quickly got back on her feet.

"Did you think something like that would kill me! All for One!" All Might shouted as blood leaked from his mouth. In truth that last attack had broken most of his ribs, and damaged his internal organs, but like hell he'd let that stop him.

KABOOM!

Suddenly All for One was shot in the back, by Gamma 2, who was covered in dents and scratches, as sparks shot out from his body. "Same goes for me!"

"Heroes." All for One growled as he healed the heavy burns on his back. "Don't think you'll walk away from this alive!"

XXXXXXXXXXXXXXXXX

Back at Jaku in the hospital, Sori had rushed out of the lab and was running through the hospital, with Kiba in pursuit.

"RAHHHHHHHHH!" Kiba shouted, as she rushed Sori, who jumped onto the side of the wall, avoiding Kiba as she charged straight through the entire hospital, and into the city.

Good. There's no way I could deal with her in such a tight space. And with the city mostly evacuated, I don't have to worry about her hurting anyone. Sori thought as she ran out of the hole Kiba created.

"Grrrrrrr! Rah!" Kiba shouted, as she suddenly sprouted wings from her back and flew into the air. Shadows flew up from the ground, flying up next to Kiba, and turning to jagged blades, before flying down at Sori.

Sori ran and dodged all of the attacks. I can't bet on her getting any weaker, I don't even know if she still has that weakness, and even if she does, I don't know if I can last that long. I have to end this now! Sorry Lady K. This is gonna hurt.

She continued to dodge the remaining Shadow Blades, until Kiba herself flew down at tremendous speeds, and slammed into the ground. So hard that it created a shock wave that knocked Sori away.

"Oug!" Sori tumbled across the ground, but quickly regained her stance, getting to her feet, and stopping herself from flying back further by digging her claws into the ground. This is my chance! If I don't do this perfectly I'm dead.

Sori dug into her pocket, and took out another syringe, as Kiba looked up at her from the crater she made.

"RAHHHHHHHHHH!" Kiba roared, as she charged at Sori once again, flying at her with her claws extended forward.

Sori rushed in, needle thrust forward like a weapon, and when Kiba got close, she stabbed her right in the eye.

"AHHHHHHHHHHHHHHHHH!" Kiba shouted out in pain, as the formula from the needle was injected into her.

Sori jumped back and watched as Kiba fell to the ground and started spasming on the ground.

"AHHHH! AHHHH GGGG! RAHHHHHHH!" Kiba cried out, as flopped around on the ground in pain.

Sori winced, but she knew it meant the formula was probably working.

All quirks carry a kind of consciousness or at least a foundation for one. She recalled Mai explaining when she handed them the needles. As such, when you take or copy a quirk from someone, you're also taking a bit of their consciousness. A Remnant of that person. By liquidizing a fractal containing that person's quirk, as well as combining it with Eri's power, we can restore a person to how they were, even if their brains have been radically altered, by making the Remnant of that person's being, take over and rewrite the brain back to how it was before. It's far from perfect, and will likely cause an immense amount of suffering, and will require a lengthy recovery period, but it's our only hope of getting Kiba back.

"Da-ddyyyy!" Kiba cried out, as tears streamed down her face. "Da-dy!"

Sori rushed over to Kiba and kneeled down. "Hey, it's okay Lady K. We'll get you back to the boss soon. Just go to sleep."

Kiba looked up at her, confused and in pain, but with some level of recognition.

She closed her eyes, and let sleep overtake her.

Sori breathed a sigh of relief and took the girl into her arms, as well as taking the syringe out of her eye.

Much to her surprise, the wound she made had immediately healed, thanks to a regeneration quirk she'd been given.

"Huh, that's convenient," Sori said, before using her coms. "This is Sori. I've finished my mission. Kiba's been injected, and kinda turned back normal, just like you said. Heading back now."

"I'm finished up here as well," Protoman said through coms. He'd stayed behind to take care of Garaki. "Garaki is unconscious, but I have bad news. While we were distracted with Kiba, he sent out his research to unknown associates."

"We'll deal with that later. Get Kiba home immediately." Mai said. "The bomb will be dropping soon so we don't have time to-what?"

XXXXXXXXXXXXXXXXXX

BRRRRRRR! BRRRRRRR! BRRRRRR! BRRRR!

Back in the labs, alarms were going off, and the whole building was starting to rumble.

"What's going on!?" Mai shouted at her scientist.

"Ma-am it's the shadow fractals! They're starting to rapidly emit energy!" One of the scientists said,

"What!?" Mai said.

But before she could say anything else, suddenly, the shadow fractal orbs burst through the center of the building knocking away any scientist nearby and tearing through the lab into the sky.

Mai looked through the massive hole they'd made and saw the orbs, shrouded in dark energy.

And then, they all shot off in different directions. Disappearing from sight.

"That can't be good," Mai said to herself.

XXXXXXXXXXXXXXXXXXX

"SMASH!" All Might shouted as he knocked All For One into the side of the creator.

"Flash Fire Fist!" Endeavor shouted as he unleashed a power attack at All for One, while Gamma 2 unleashed a blast at the same time.

KABOOM!

The two blasts hit their target, and the collision made a giant explosion.

All for One slid down the destroyed crater side, landing face-first in a pile of rubble. "Damn it. This can't be."

"This ends now All for One!" All Might shouted.

"Looks like we don't even need the bomb to beat him." Gamma 2 said confidently.

"Bomb?" All for One questioned.

"Be quiet you idiot!" Endeavor shouted at the android.

"Oh relax, without the Chaos Emerald, he's not a match for the power of true justice!" Gamma 2 said striking a pose.

BRRRRRRRR! BRRRRRRR! BRRRRRRR!

"Huh?" Gamma 2 stopped his theatrics when he suddenly decided something. "Something's coming towards us."

A few seconds later, it arrived.

Stopping in the air above the combatants, was the One Star Shadow Orb.

"What the hell is that?" Endeavor asked as they all looked at the orb.

"It's a shadow fractal orb." Gamma 2 answered. "But what's it doing here?"

Then, the shadow fractal's dark aura started to spill out more and more, becoming thicker and thicker, until the ball could no longer be seen.

After a few moments, the aura subsided, and a new creature could be seen floating in the air.

It was a large, and bulky humanoid creature, with mostly dark gray armored skin, with some yellow designs on his chest and forearms, as well as some unarmored parts that were dark blue.

The creature had two long horns extending from its head, four black spikes coming out of its back, as well as four more coming from its elbows and knees, and three more on its chin. It had long elf-like ears coming out of the sides of its head, and what looked like some kind of dark gray mustache.

Lastly, the shadow fractal orb was lodged in its forehead.

The creature slowly descended to the ground, in the center of the battlefield, in between the heroes and All for One.

"Who are you! Tell us why you're here, or we'll assume you're an enemy!" Endeavor shouted.

The created paid him no mind, and instead looked over to All for One, and gave a sinister smirk.

He rushed over to the weekend villain and grabbed him by the face.

"What are you-" All for One stopped when he noticed something, arising from within him.

Power.

A dark aura started forming around All for One that got bigger and bigger each second.

And then, it exploded, erupting into a pillar of darkness that reached into the sky.

"Ah, shit." Gamma 2 cursed, as he noticed the stupid amount of chaos energy coming off of those two.

When the darkness died down, the two were visible once more.

But All for One looked different.

His skin was now pitch black, and two white horns formed on his forehead. His nails had turned into claws, and his torn and tattered shirt had completely been destroyed. Lastly, his white hair had grown out, now being a bush of hair that reached his lower back.

"There you are." The creature cackled as it removed its hand from All for One's face.

"What…is this?" All for One asked though an exhilarated laugh, as he let his new power flow through him, a dark aura that resonated from his body. "This power! It's not as much as the emerald, but it's far from unwelcome!"

"Each time you stole a quirk, you took a remnant of that person with you." The monster explained. "Enslaved by your quirk, those hundreds of remnants, stewed inside you, their hatred growing with each passing second. This is that hatred unleashed, and made manifest! This is the power of hatred!"

"I see." All for One smirked, before looking back at the heroes. "Well, it seems like the tides have turned yet again. And what was that about a bomb?"

Endeavor gave Gamma 2 a glare, and the android just hung his head in shame.

"Oh, you need not worry about that my friend." The monster said as he looked up. "I will take care of that."

PEWM!

Suddenly, red lasers shot from the monster's eyes, shooting up high into the sky, until it hit the bomber ship that was flying high above.

KRAKOOM!

The beam caused the ship to explode, unleashing the power of the bomb that exploded in a bright green flash of light.

After a few moments, the flash died down.

"Damn it!" Endeavor roared.

"Bomb 1 is gone! We're flying in bombs 2. You have to make sure it reaches its target!" Mai shouted over coms.

"On it!" Gamma 2 said. "You two! I need you guys to hold off All for One! I'll take the monster!"

"Monster. I think I'd much prefer it if I had a name." The creature said. "I like the sound of…Syn. Yes. Call me Syn! And I will be your despair!"

Syn Shenron has joined the fight! And in case you're confused, this is based on Xeno Syn Shenron. Which is why his colors are different.

Please review and have a nice day.