Spirit of Vengeance

by Kyodon

Izuku is desperate. He's powerless, has no friends other than his sister, and his mother has been diagnosed with cancer. Thinking that his life has no value, he makes a deal with the devil to save his mother. Things don't go as planned, as Izuku becomes the host for something ancient, something powerful, something very vengeful and now it's fury is unleashed upon the world.

4. Chapter 4

The Police station hero meeting room.

Naomasa walked into the meeting room and saw the many heroes who had gathered here.

Mt. Lady, Death Arms, Backdraft, etc.

All of them here to help solve one issue.

"Alright, everyone. Today we will be looking over what we know about Midoriya Izuku, or as the media calls him, Ghost Rider. After we look overall we know we will attempt to figure out a way to capture him." Naomasa said. "Understood."

Everybody nodded.

"Alright," Naomasa said, opening Izuku's file. "Izuku Midoriya was a seemingly quirkless child, who, two weeks ago, committed suicide."

"Wait if he killed himself then how is he alive?" asked.

"I'm getting to that," Naomasa said. "About a week after he died, Midoriya suddenly came back to life and broke out of the morgue he was being kept in. It seemed as if dying had awakened his quirk. However, it seems that for whatever reason, he's being forced to kill criminals. We don't know if it's an effect of his quirk, some sort of mental issue he developed from dying, or an outside source. Either way, he's not doing this of his own free will."

"If he doesn't want to kill people then why doesn't he turn himself in?" Death Arms asked.

"From what I've seen, he doesn't believe we can help him," Naomasa said. "It seems like he's trying to handle this himself."

"Well, that's dumb. What the heck does this kid think he can do that we can't?" Death Arms asked.

"To be fair, he is a fifteen-year-old who just came back from the dead and is being forced to kill people. I doubt he's in anywhere near a good mental state." Eraserhead stated.

"Fair point." Death Arms said.

"Regardless, about a week ago he escaped from the hospital. He's unfortunately been killing villains since then, although it seems to be trying to resist, to varying degrees of success. Sometimes he's able to let villain's escape, but other times there are no survivors." Naomasa explained. "Multiple heroes have attempted to stop him, but none of them have even come close to succeeding."

"Yeah because he's too damn strong!" said, grimacing as she remembered her encounter with Izuku.

"Yes. Izuku Midoriya's quirk is a transformation type quirk, although it is unaffected by Eraserheads quirk for whatever reason. He has an abundant amount of abilities, firstly he has enhanced strength, durability, speed, he can control fire that is so hot that it instantly evaporates water, and he can also make things out of seemingly nothing. Known examples of things he has made are chains, a motorcycle, and a shotgun. Lastly, due to the fact that his transformed state is literally a skeleton, he is completely immune to any quirks that target organs or require the target to be alive. His quirk has known limitations, drawbacks, or time limits, and he has shown no potential weaknesses whatsoever."

"What kinda quirk is that?" Backdraft asked. "It seems like he has multiple quirks."

"Yes, it's quite versatile. Nothing we've thrown at him at has even phased him." Death Arms said. "I punched him as hard as I could, but he just ignored me and kept on doing what he was doing as if I wasn't there! And when I tried to grab him, he knocked me outa the building with a backhand!"

"He just stood there while I was attacking him," Backdraft said. "Literally just stood there."

"I stepped on him, and he just threw me off and ran away!" said.

"Midoriya seems to want to avoid hurting people that aren't his targets. This includes the heroes. Often Midoriya will try and pretend as if the hero he's fighting simply isn't there before escaping on his motorcycle. Midoriya has never directly and purposely attacked a pro hero, if a hero binds him, he will just break out, with little to no effort." Naomasa reported.

"So basically we're all so weak in comparison to him, that he literally doesn't have to try," Eraserhead said. "And on top of that, he has no weakness or any other limitations."

"Welp. We tried. Let's call All Might." said.

"Sounds like a good idea," Backdraft said.

"Woah Woah Woah." Death Arms said. "What are we gonna just give up?"

"I mean he seems pretty unbeatable for us." Mt. Lady said.

"Not necessarily," Eraserhead said. "It's a transformation type quirk. Meaning that he's still vulnerable when not transformed."

"So we just jump the kid?" asked.

"I wouldn't say that but yes," Eraserhead said.

"Still you would have to take him down instantly, and without him suspecting anything," Naomasa said.

"That shouldn't be a problem!" Said a booming voice entering the room.

Everyone looked at the door and saw that the source of the voice was none other than All Might himself.

"Because I am here!"

Meanwhile with Izuku.

Izuku was sat at the local library, looking through the books for anything related to demons.

He had a stack of books on the table he was at. But none of them even mentioned Zarathos.

AGHHH! Izuku screamed inside his head, it was a library after all. I'm getting nowhere!

It was a full week since he left the hospital, he learned that he could make clothes using his powers, and had made himself a green hoodie and jeans, the hoodie was quite large so it did a good job at hiding his face and hair.

Maybe Zarathos was right. Maybe I can't get rid of him. Izuku shook his head. No! There has to be away! I have to keep trying! Or else people will die!

Izuku found that he can resist Zarathos's influence, and keep himself from going berserk. All he needs to do is stay calm and keep his emotions separate from Zarathos. This is easier said than done, however, as Zarathos will try his damndest to make Izuku lose control, often showing him images of whoever the victim is, in his head, whether they be alive or dead.

Ironically it was the victims who were still alive that made Izuku more likely to transform, simply because he could still save them, even if it would be at the cost of the lives of the villains.

Children were also a sore spot for Izuku if the victim was a child, alive or dead Izuku would likely go berserk and transform.

When he went berserk it was very, very hard for Izuku to stop himself, not impossible, just difficult.

Izuku sighed. I need to find something to lighten my mood, if I stay frustrated then I'll be easy picking for Zarathos.

After putting all the books back, Izuku exited the library.

Alright, where should I go? I only have so much money so I need to be careful about how I spend. Izuku thought as he walked down the sidewalk, keeping his head down so no one could see his face.

Izuku knew he needed money, because while he didn't need to eat to survive, not eating for long periods of time still would cause him a great amount of pain, and leave him in a bad mood, meaning that resisting Zarathos would be impossible. So he often just took money from some of the criminals he killed.

Maybe I should go to a dessert shop, those do help me calm down more. But maybe I should get something more filling. Izuku thought.

Izuku was so lost in thought that he didn't notice that someone was coming his way.

"Oomph!" Izuku cried as he fell to the floor after accidentally bumping into someone.

Groceries fell to the floor and Izuku realized what had just happened.

"Oh god, I'm sorry!" Izuku apologized, getting up quickly and looking at the person he bumped into.

It was none other then Toshinori Yagi, AKA All Might, in his skinny form.

"It's fine I-" All Might looked up and realized who he bumped into. When the two fell Izuku's hood went down, exposing his face.

What are the odds!? All Might thought to himself as Izuku picked up his fallen groceries. Alright, stay calm. He doesn't know who I am, and I can't just transform, otherwise, I'll give away my identity, I have to just act like nothing's wrong, then I can find a place to transform, and I'll deal with him then.

With a plan in mind, All Might spoke. "It's fine. I wasn't looking where I was going."

Izuku finished picking up all of his groceries and handed them to All Might. "I wasn't looking where I was going either! Please accept my apology!"

"Apology accepted." All Might said quickly, wanting to get away and transform.

"Thank you, have a nice day!" Izuku said before quickly running past him.

All Might waited for a few seconds before running in the opposite direction.

I apologize for this young Midoriya. But it's time for this to stop! All Might thought.

A few minutes later

Izuku had finally decided to get dessert.

Alright, now I just need to figure out where to go. Izuku thought.

Then, in the blink of an eye, All Might ran up behind him, and delivered a chop to Izuku's neck, knocking him out instantly.

Izuku's body went limp, and All Might caught him before he hit the ground.

All the people around them looked at All Might with surprise and confusion.

"Don't worry everyone! I was just subduing a villain!" All Might said.

If anyone else had knocked out a child and then said that they were subduing a villain, people would be suspicious. But since this was All Might everyone just flashed him a smile, cheered a little, and moved on.

All Might hoisted Izuku onto his shoulder and jumped away.

Now to take him to...Tartarus. All Might thought with a frown. He didn't like the idea of sending a child to Tartarus. Especially since Izuku was not in control of his criminal actions. But Izuku was too powerful to be held anywhere else.

A few minutes later, at the bridge to Tartarus

All Might looked at the supermax prison with a sigh. He really, really didn't want to do this, but he had little choice.

He leaped over the bridge, but then something else happened.

Before he could reach the prison, Izuku's body suddenly burst into blue flames.

"Hot! Hot! Hot!" All Might shouted.

The flames exploded out, knocking Izuku's flaming body off of him, and into the water below them.

"Oh no!" All Might shouted as he watched the boy fall into the water.

He dived into the water at breakneck pace, in an attempt to get the boy out of there before he drowns.

Once in the water, he looked around rapidly while he swam downwards.

Where is he? He couldn't have sunk that far down, where did he go? All Might asked frantically.

Then he saw something, deep below him, a bright blue light.

All Might swam towards it, relieved that he had finally found the boy.

This relief didn't last long as he noticed it wasn't just him heading towards the glow, the glow was heading towards him.

A chain came out of the blue glow and wrapped around All Might's neck. And the blue glow was revealed to be "Izuku's" transformed state, riding a motorcycle underwater somehow.

Little did All Might know, that when he knocked out Izuku, it gave Zarathos a free pass to take control of Izuku's body. Normally Zarathos would avoid doing this, as the energy needed to take over Izuku's body, would make it harder to influence Izuku for a while.

However, Zarathos has been trapped for a very long time, and he was not about to be sealed away again. Even if it was unlikely that they could contain him at all, he was not about to take chances.

Zarathos sped past All Might, yanking the chain around All Might's throat.

The two burst out of the water, flying through the air until he landed on the bridge.

He took the chain that All Might was still attached to and used it to throw All Might far, far away from him.

He saw All Might fly into the distance until he was so far away, he could not be seen.

Good. Now that he has been taken care of, I should make my exit. Zarathos thought. Then again.

Zarathos looked at the prison behind him, he could literally feel the sin coming off the prisoners from here.

I won't be able to influence Izuku for a while after this. I should take advantage of my having control while I still can. Zarathos thought.

He revved up his motorcycle and sped towards the prison.

Meanwhile with All Might.

All Might flew through the air, a surprised expression on his face.

How did he wake up so quickly!? He thought.

He shook his head. I need to get back there! Before he escapes!

All Might flicked the air, creating a whirlwind that slowed him down.

He kept flicking the air until he not only managed to stop himself but move himself into the opposite direction.

All Might flew back to the bridge at rapid speeds, managing to make it back to the...bridge.

Or rather, what was left of it.

The entire midsection of the bridge was destroyed, making it impossible to get in or out of the prison without the use of a quirk.

All Might landed on the part of the bridge that leads to the city, looking at it with extreme confusion.

Why on earth would he destroy the bridge? All Might wondered.

KABOOM!

He got his answer in the form of a massive explosion that came from Tartarus.

All Might looked at the explosion with a horrified expression.

Wait! Is he trying to...kill all the prisoners in Tartarus! All Might thought.

KABOOM!

Nothing good can come of this! I need to stop him now! All Might thought.

He lept into action, jumping towards the prison.

Inside the Tartarus

Zarathos was having the time of his life, he rode throughout the prison, riding through doors turrets and whatever else they sent to try and stop him.

The poor guards stood no chance, as Zarathos just threw them aside with ease. What's worse is that Zarathos eventually blew up the generators, "freeing" all the prisoners, although with the bridge destroyed they were still just as trapped.

One of the guards ran for his life as a prisoner ran after him with murderous intent.

The guard tripped and the prisoner caught up and was about to kill him when All Might came in and punched the villain in the face.

"SMASH!" He shouted, knocking the villain into a wall, unconscious.

"All Might!" The guard said. "Thank god you're here. Ghost Rider showed up and started destroying everything. Nothing we could do to stop him, he killing everyone!"

"Do you know where he is now?" All Might asked.

"AHHHHHHHH!" All Might heard someone scream.

"He's here! Someone help!" Someone else screamed.

KABOOM!

"I'm guessing he's over there." The guard said.

All Might lept towards the screams and explosions, but by the time he got there everything in that area had been destroyed and everyone there was dead.

He saw Zarathos looking around for his next victim when his eyes landed on him.

"You are an annoyance. Leave this place. Or your life is forfeit!" Zarathos demanded.

Something is wrong. All Might realized. He's acting completely different from the reports, and his flames are blue rather than green. What's going on?

"Midoriya! Stop this! You're not in control of yourself!" All Might said.

"Izuku is not here. Leave now!" Zarathos said.

Something is definitely wrong! I need to subdue him before he kills even more people! All Might thought.

All Might charged at Izuku, expecting to overpower him easily.

All Might sent out a punch at Zarathos, only for Zarathos to catch it.

"What!?" All Might shouted in confusion. I put seventy percent of my power into that!

"Very well. Your fate is death!" Zarathos shouted.

Zarathos opened his mouth and flames burst out, enveloping All Might.

"GaH!" All Might grunted in pain. His quirk...it's strong! I can't hold back! Not even a little.

All Might attack again, this time with full power, his fist coming out of the flames catching Zarathos off guard.

The punched connected and sent Zarathos flying through several walls.

Once Zarathos stopped he quickly noted that he had made a dent in his skull.

How could a human be this strong?! Zarathos wondered, before shaking his head and healing the dent. No matter. A human is a human.

All Might charged at him, and Zarathos sent bladed chains out of his mouth, cutting up the number one hero.

"GAH!" All Might shouted as he was cut up, by a seemingly endless sea of chains spewing from Zarathos's mouth

Thinking fast, All Might grabbed one of the chains and pulled at it, causing Zarathos to go flying towards him.

"Texas Smash!" AllMight bellowed, delivering a fierce blow to Zarathos's skull, making it crack a little.

The chains broke apart, before turning into embers, and Zarathos went flying once more.

Zarathos sent chains out from his body into the ground, slowing him down until he came to a stop.

"RAHHHHHHHHH!" Zarathos let out a demonic roar, making everyone cover their ears. "I will not be thrown around, like a child's plaything!"

He summoned his motorcycle and charged at All Might, running him over.

That speed! I've never seen anything like it! All Might thought before getting hit by the motorcycle again.

All Might was getting run over repeatedly, not able to keep up with the hellcycle's speed.

In response All Might punched the ground, making it burst.

"Rah!" Zarathos shouted as he was knocked off his bike by the sudden upwards force.

Capitalizing on the opening, All Might zipped over to Zarathos and picked him up, holding the demon to his chest.

All Might grit his teeth as the fires burned his skin, but he had to endure it. "Midoriya I know you're in there! Look at this! Look at all this destruction! This isn't what you want!"

Zarathos struggled, trying to escape All Might's grip as best he could. He could feel it, All Might's words were doing something, waking up Izuku bit by bit, it wouldn't be long until Zarathos lost control.

"NO! NOT YET! NOT YET!" Zarathos screamed.

His blue flames started burning brighter, and brighter, becoming more and more difficult for All Might to endure.

"Midoriya!" All Might grunted.

"RAHHHHHHH!" Zarathos shouted as he put all his power into this next attack.

And then everything was enveloped in blue.

KRAKAKABOOM!

A massive explosion, visible by the entire city, rocked Tarturus shaking the entire prison.

Blue flames washed over almost everything, the hellfire killing every prisoner it touched, reducing them to nothing.

After several minutes the explosion died down.

All Might was on the ground, his body covered in burns and cuts. He'd only barely managed to stay conscious via sheer willpower.

He opened his eyes and found Zarathos was standing a few feet from him, with his back turned.

H-He's still able to stay in that form, even after using an attack like that?! Does this quirk...have no limits!? All Might thought.

He forced himself to stand, slowly rising which gained Zarathos's attention.

He turned around and looked at the rising hero. "You're still alive?!"

Zarathos turned and walked up to All Might, creating a sword in his hand. Normally Zarathos wouldn't go out of his way to kill an innocent soul, mainly because he wouldn't be able to collect their soul, but All Might was too much of an annoyance, he would be dealt with here and now.

"You are an annoyance! DIE!" Zarathos rose the sword upwards.

Stop!

Suddenly Zarathos was unable to move.

NO! NO! Not yet! Stop this nonsense! Izuku! Zarathos mentally commanded.

NO! I won't let you! Green flames swelled around Zarathos, as Izuku refused to let him move.

All Might watched Zarathos struggle with the green flames, as he finally got to his feet.

Young Midoriya is resisting. But even still, will that be enough? His power is seemingly endless. If Midoriya can't win I'll be in big trouble! All Might thought. I need to end this now! But how! My punches are only making him angrier! Can I...can I truly win this?

All Might has never encountered such overwhelming power, even All for one showed signs that he was being hurt, or that he was tiring. But nothing he did seemed to do much to Zarathos and he didn't show any sign of exhaustion. It's as if he wasn't even human. But still.

No. Young Midoriya is counting on me to stop him, I can't let him down! All Might thought.

He charged up One for All, putting every last ounce of power he had into his right arm.

If I concentrate all my power into a single punch! Then I know I can take him down! All Might thought, steam coming off his body as he pushed it to the limit.

Zarathos looked at All Might readying his attack. NO! STOP THIS!

DO IT! ALL MIGHT! Izuku cried out in his mind.

"DETROIT! SMASH!" All Might yelled as he rushed Zarathos and delivered a thunderous blow to his skull.

TWOOM

The whole area was enveloped in strong winds, as a tornado, once again visible from the city, blew through everything.

After the winds died down the results could be seen.

All Might's body was steaming, as he tried desperately to stay in his buff state.

Did that...did that do it? All Might thought.

He looked back, and his heart stopped.

His head. His head was gone. All Might could even see bits of shattered skull scattered around him.

All Might lost his concentration and deflated into his skinny form. "No. No. I-I killed him. What have I-"

Before All Might could finish, green flames shot out of Izuku's neck, and in mere seconds his skull grew back.

All Might's jaw dropped in shock. "H-how!?"

Izuku, now back in control of his body looked at All Might skinny form, making his jaw drop. "All Might!?"

Izuku transformed back into his human form and ran up to the weakened hero.

"All Might! What happened?! Did I do this to you!?" Izuku asked, his voice full of concern and panic.

He seems to be back in control of himself. All Might thought. Good. I-I-I.

Black spots filled All Might's vision and he dropped to the ground. Unconscious.

"All Might!" Izuku shouted. "ALL MIGHT!"

Well, that's the end of this chapter. If you have any questions please either private message me or put it in the reviews, and please leave your thoughts as well.

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