Todoroki, Uraraka, Bakugo, Momo, Aiba, Tokoyami, Mina and Jiro were running down a wide metal hallway filled with pipes.

This was it, they were going to find and defeat their greatest enemy once and for all.

But from the darkness above them, a figure fell and landed with grace behind them, causing the Phantom Thieves to stop and turn to regard the figure.

It was a male, and he was wearing a white, gold and red nobleman's suit, and he had on a bright red crow like mask. He had green and black hair. "Long time no see."

Bakugo stepped back "You…!?"

Uraraka stepped behind Bakugo "Why's he here…!?"

Izuku shrugged "Hmph… I'm impressed that you managed to deceive me. It seems I underestimated your abilities." Izuku turned to Todoroki "You truly are interesting… Quiet, yet possessing the courage and determination to take action. Under different circumstances, we could have been great rivals… or perhaps even friends."

Todoroki shook his head "We're already rivals."

Izuku covered his mouth as he laughed "How wonderful!" he stopped and focused his attention back on Todoroki "You don't allow yourself to be enslaved by such things as human relations or past selves… And so, your heart is always free. The exact opposite of mine. To be honest, I'm envious… I wonder why we couldn't have met a few years earlier, Shoto…" Izuku said regretfully.

"Izuku…" Momo held a hand over her heart, feeling sympathy towards her enemy.

Izuku looked to the floor "But… it's no use talking in hypotheticals. That didn't happen in reality…"

Mina spoke up before Izuku could continue "Izuku! Why are you cooperating with someone like All For One!? Don't you see what this place looks like!? His true nature is-"

"Cooperating…? What are you talking about? I don't care about All For One, or his goals. All this is to make All For One… my father… acknowledge me. Then exact revenge on him."

"He's, your father…!?" Tokoyami asked, going wide eyed.

Izuku nodded "Remember I said before, how my mother had been in a relationship with some good-for-nothing man? So I'm his bastard child. My very existence is nothing but a scandal… My mother's life turned for the worst after she had me… and died. I was a cursed child for her too." Izuku said, not able to control his sadness.

Momo wanted to reach out to him "That's horrible…"

"I resented him, but he was already a high-ranking villain by then. A kid like me could do nothing. But… that's when it happened!" Izuku began to chuckle and his face twisted into an insane gleeful smirk. He threw his arms out and held his head high "That's when I learned about the cognitive world! Someone, be it god or demon, gave me a chance! I couldn't contain my laughter…!" Izuku started laughing as he held both hands clenched in front of him, eyes wide and bloodshot, showing that he was utterly insane.

Bakugo grit his teeth, remembering everyone Izuku killed "You son of a…!"

Izuku shrugged "Who cares? My targets were all doing the same damn thing in this eat or be eaten world. All I did was remove their evil from society. How is that any different from the Phantom Thieves?"

Momo stomped her foot "We're not murderers!"

Izuku threw a hand out "So what!?" He shouted in a sudden outburst. "All For One is finally within my grasp! Once he reaches the apex of his power and acknowledges me, I'm going to whisper in his ear… I will tell him the truth of who I really am! And that's when I – an utter disgrace to the world – will rule over him. I will prevail!"

Tokoyami shook his head at Izuku "What a warped thought… It's almost pitiable."

Izuku placed a hand over his face and started whispering loudly to himself "In just a few weeks, my plan would have come to fruition…! But no, you just had to interfere…!" Izuku pointed at the Phantom Thieves as he was almost crying "I can still take it back though, I'll just need to kill you all."

Aiba scoffed "We won't get killed for something like that. You talk big, but you're really nothing more than a little kid throwing a temper tantrum!"

The green haired boy growled at her "Don't lecture me, you piece of shit… I am going to personally thrust All For One into a living hell. So, Shoto… rest easy and die."

Todoroki shook his head "Let's finish this."

"I agree. There is no need to speak any longer."

Bakugo rolled his arms, stretching them "You sure sound confident, but don't go pressing your luck, Deku. We already know all your tricks from when you were working with us."

Izuku chuckled and shook his head, smirking and turning to Todoroki "Shoto… how could you be so successful while having such an idiot as a partner?"

Bakugo let small explosions cover his hands "Huh!? Quite bluffing, Deku!"

Mina shook her head "It's no bluff. If he truly is behind the mental shutdowns, he's likely only shown us a fraction of his true strength."

Izuku chuckled again "I'll tell you all about my true power… while you die. You can take that knowledge with you to the grave." Behind him, a few Nomus burst into existence "Kill them!"

The song 'Blooming Villain' begins to play.

Izuku summoned a laser sword as two of the Nomus gathered behind him. Other Nomus fought the group, leaving a small number of them to fight Izuku. "The mental shutdowns aren't the only incidents people are talking about. There are also the breakdowns which cause people to turn psychotic, creating incidents and scandals… Those cannot be explained unless the true culprit has the power to make people's hearts psychotic…" Izuku chuckled to himself when he saw their faces "That's right! It's my power – one that you don't have!"

Uraraka stood ready alongside Todoroki, Bakugo and Tokoyami. "He's gonna try something."

"Allow me to show you!" Izuku screamed before he grasped the mask around his face and pulled it off. A blue light surrounded him and a black figure rose out of him. The figure released a wave of red energy that hit the Nomus.

The two Nomus convulsed before their skin darkened and red veins appeared all over them, their eyes glowing yellow.

"What was that!?" Bakugo shouted, preparing himself. "That wasn't Robin Hood, could he summon something different?"

Izuku spread his arms as the figure sank back own into him and his mask reformed. "Even the feeblest existence can gain tremendous power once the chains on its heart are broken. You'd better not underestimate these two." Izuku said before he jumped back.

Uraraka pulled out a pistol shed pilfered from a defeated villain. If they were going into the bellow of the beast, she'd need protection against the Nomus, and her Quirk wasn't all that good by itself, it is mainly a support Quirk.

She aimed at one of the Nomus and fired, and gasping when she saw the Nomu not even react to the bullet.

Todoroki quickly froze one of the Nomus solid, but before he could react, the one Uraraka attacked was in front of him and grabbed him by the neck, picked him up and threw him across the room. The frozen Nomu was killed when Bakugo blasted it to pieces with an explosions.

The last Nomu turned around and kicked Uraraka away before she could touch it but it was knocked to the floor when Tokoyami's Dark Shadow grabbed it and smashed it face first into the metal floor.

Uraraka touched Todoroki and pushed him as hard as she could towards the Nomu. Cancelling her Quirk once he was over the Nomu.

Todoroki summoned flames into his fist and plunged it into the Nomus back, burning its internals to ash and killing it. Izuku walked towards them "Tch, well done."

Uraraka came back to the group "That power to make others turn psychotic… he used it on actual people…? This guy's out of his mind…!"

Bakugo clenched his fists and grit his teeth as he remembered everything he'd done to his childhood friend over the years. 'Did I do this…?'

Izuku hummed in his throat "Of course, I didn't expect you to be defeated by them. You have deceived me and escaped death, after all. I wouldn't give up my chance to massacre you with my own two hands…!"

Izuku pulled his mask off and blue light surrounded him before forming into another figure. This one was Robin Hood. It was a tall white figure, with a golden winged helmet and a golden bow shaped like wings. It looked like a superhero.

It pulled back on the string and a blue beam arrow appeared. Once it let the arrow loose, the arrow split and formed into four different arrows, surging towards them and forcing them to dodge.

Once they had, Izuku jumped at Uraraka, who was mid-air and couldn't dodge. Izuku brought his laser sword down onto her, cutting and burning deep into her arm. Izuku was then knocked away when Bakugo propelled himself forward with an explosion and punched him in the face.

"Ngh… Damn…" Izuku laughed to himself, his insanity revealing itself through his voice "So… neither of us had shown our true strength, huh…? …Don't underestimate me!"

Izuku called forth Robin Hood once again, and used one of its most powerful attacks. A blue ball formed near the ceiling and it shined down rays of light, each ray burned and melted the metal to slag. The group were barely able to dodge, and Uraraka had to be saved by Tokoyami's Dark Shadow, even with the light burning him away.

Izuku tried to capitalize on his opponents openings but found that he couldn't. He looked down and saw most of his bod covered in ice. He gasped and looked up, just as the blue sphere dissipated, Todoroki jumped up and came down with a fist full of ice.

The ice shattered from the force of Todoroki slamming it into Izuku's skull. The attack also broke the ice holding him still and sent him rolling across the floor.

Izuku clutched his wounds and glared at the team as they finished off the last Nomus and all gathered together across from him. "Damn it…!"

Aiba glared at him. "So he's able to turn people psychotic… I thought it was some special thing like All For One, but it seems to be his own Quirk's power."

Momo shook her head "I can't believe that the ability to control and drive others mad was born from within his heart…"

Izuku slowly stood up, gasping and glaring at them. "I'll kill you… You're all gonna die…!" he fell back to the floor, unable to keep standing.

Mina called out to him "Izuku, please stop! You're fighting the wrong people! We both ahte the same guy! Why do we have to go against each other!?"

Momo nodded her head "Killing us won't make you happy."

"But… I…!"

Bakugo stomped his foot "This ain't about what your father says! You're your own person! You gotta know that!"

Izuku slammed a fist into the ground "Damn it…!"

Aiba sighed in pity for Izuku "You… don't really hate us, do you? That smile before we fought… Isn't that how you really feel?"

"…!?"

Aiba kept it up, seeing Izuku look at her with wide eyes "Follow your true feelings…! Even if you think people hate you or don't want you around, that's-"

Izuku brought both fists down onto the ground "Shut up, shut up, shut up! Teammates!? Friends!? To hell with that!" Izuku stood up, now filled with more strength from his rage. "Why am I inferior to you…!? I was extremely particular about my life, my grades, my public image, so someone would want me around! I am an ace detective… a celebrity!"

Jiro looked away "Izuku-kun…"

Izuku growled at Todoroki "But you… you're just some worthless trash living in his father's shadow! So how…!? How does someone like you have things I don't!? How can such a worthless piece of trash be more special than me!?" Izuku raged, tears coming to his eyes.

Todoroki sighed before responding. "Look inside yourself, there's your answer. You need to stop."

Izuku laughed to himself "This argument is meaningless…!" A red light surrounded Izuku and for a second he was dressed in black armor like clothes with a black helmet shaped like an animal's jaw around his head. It was there for in instant before he went back to normal.

Momo jumped back "What was that…!?"

"A black mask…!" Tokoyami realized.

A flashback showed Overhaul laying on the ground in front of them. "Wh-What about the other one though? The one with the black mask?"

As it went back to the present Aiba put a hand to her chin "Then, what Tomura said before…" She remembered when they defeated him, he told them about a criminal using his Quirk to manipulate the world. Mental shutdowns, psychotic breakdowns… anything goes.

Izuku looked to the ceiling, putting a hand on his head "Oh, this is great… I'm surprised… This is actually a first for me. I might even have to try my hardest against you. You know… I just came up with a fun little idea…" Izuku moaned "I wonder how far I can go with this…"

"Fun…?" Momo asked, readying herself.

"You wanted to see my powers, didn't you? Fine… I'll show them to you!" Izuku started laughing again, this time harder than ever before "I've never felt this like before! You're right; I don't give a damn about that man's acknowledgment… All I care about now is killing all of you… To prove I'm better than you!"

Izuku's eyes went blank and bloodshot as he completely lost it "Here… I'll show you who I really am!" Red light gathered around him. "Come… LOKI!"

The red light burst from him and formed into a menacing figure above him. Black and white strips took up most of the body. It had long hair in many braids all the way down. It had a large black sword that floated around it and golden boots, it also had two horns coming from the top of its blank face and pointing upwards.

Tokoyami gazed at it "Again… it's that Quirk!"

Izuku's clothes turned black and slowly burnt away as another costume took its place.

Jiro put a hand over her mouth "What's going on!?"

"Don't make me laugh! Justice? Rightous!? Keep that shit to yourselves!" Izuku shook with anger as he covered his face and moved erratically "You and your teammates piss me off!"

Aiba slowly backed up "He can use two different Quirks!? Then everything… even his appearance was a fake!"

"You're going down… I'll destroy you… Go down with me!" The same red energy from his unique psychosis power formed around him, and he instantly got much stronger than he was before.

"No way…!" Uraraka gasped.

"Deku, you bastard… you made yourself go psychotic!"

Izuku leaned back and laughed… just laughed his head off as Loki disappeared.

His mask formed back onto his face with Loki gone and he leaned forward, showing his psychotic eyes through the teeth in his helmet as he smiled at the group "Now! Let's see you drop dead one at a time, in front of your precious friends! DIIIIIIIIIE!" Izuku screamed, smile covering most of his face as he launched himself at them, tattered black cape flowing behind him.

Izuku grabbed Uraraka around the throat before she could dodge, she could hardly see through the red and black evil that swirled around Izuku. "I will kill you! Destroy you! Crush you…! Teammates are nothing but trash!" He screamed before summoning Loki and having it swing a kick into her stomach as he let her go, sending her crashing into the metal wall.

Todoroki went to attack Izuku, surrounding his fist with fire before shooting it towards Izuku in a whirling tornado. Izuku just kept smiling as Loki let go of its sword and it spun around. A red shield appeared in front of Izuku, and the fire washed over him without hurting him.

Todoroki then changed it up, and tried to freeze him solid. Loki spun the sword again, and a blue shield appeared, blocking the ice from touching him. "Damn it! He's immune to elemental attacks!"

Bakugo sped up and kneeled in front of Izuku, putting his hands up. "Just shut the fuck up!" He screamed as he fired two powerful explosions into Izuku's chest, sending him into the roof.

As Izuku fell back down, Tokoyami's Dark Shadow grabbed hold of him and threw him towards Jiro. Izuku reached out his hands to grab her as he got closer, but she just smirked and let him grab her. With her now being close enough, she stuck her amplifiers over his ears and blasted the sound of her heartbeat as loud as she could, causing the boy to scream and grab her arms.

Izuku pulled her arms away from him before putting his feet on her chin and pushing. It almost broke her arms, had she not wrapped her Jacks around his feet and pulled them apart before flipping them upwards, and bringing him down onto the ground headfirst.

His helmet protected him, and while Jiro was getting back up, Loki appeared and sliced his sword across her legs, just under the knees. She fell to the floor with a scream and Izuku wrapped his legs around her neck, before standing on his hands and jumping sideways, trying to snap her neck.

Uraraka, who had escaped the metal wall, touched Jiro, allowing her to move with Izuku and avoid certain death.

Izuku stopped and laughed when he noticed this and let go of Jiro, sending her to roof and punching Uraraka in the face. Uraraka recovered quickly and cancelled her Quirk, bringing Jiro back down onto Izuku, causing her to place her amplifiers over Izuku's ears again, but Loki was already there, grabbing her hands and instead putting them up to her own ears, making her blast herself.

Loki them spun his sword again, creating a wall of wind blades to stop Momo, who was coming to help.

Now the two of them were locked here with Izuku. While Jiro was clutching her ears, Loki grabbed her head and rammed it into the floor, dazing her and stopping her from being able to help Uraraka who had Izuku's hands wrapped around her neck.

"Die! Die! Die! DIE!" he screamed as he lifted her up and squeezed as hard as he could.

Todoroki created an ice wall where the wind wall was, stopping it and then breaking it to let the others through.

Bakugo was the first through, using his explosions to become faster, and sending a kick to Izuku's head, sending the by tumbling away. "You good?" He asked his teammate, turning his attention back to Izuku when she coughed and nodded.

Izuku got back on his feet "You're just… pieces of shit… who lick each other's wounds…! Anything goes… if you say you're teammates…!" He charged again at them, but was stopped when Uraraka touched him and making float in the air helplessly.

"Why are you… looking at me like that!? I've… I've succeeded until now… all by myself…! I don't need… teammates… I don't…" Izuku glared at Bakugo with nothing but hatred and murderous rage.

Todoroki used both his powers, surrounding his right fist with ice and his left with fire, before punching Izuku with both. The insane boy screamed and wailed in pain as the fire exploded into a tornado which engulfed him, and the ice became sharp shards that were pulled through the flames. The ice melted, but it was cold enough to cut through Izuku before melting.

The half and half hurricane attack smashed through Izuku and sent the boy into the roof, and Uraraka cancelled her Quirk, letting the beaten boy fall to the floor.

Bakugo and the others stood over Izuku, as he tried to stand up again. The person Izuku once called Kacchan shook his head with pity "You ready to call it quits?"

Izuku was able to get onto his knees, and looked at them through his half broken mask. "I know… I've had enough… You're so lucky. Lucky to be surrounded… by teammates who acknowledge you… And once All For One is defeated, you'll all be Heroes. As for me, people will find out my past deductions were just charade. My fame and trust will vanish." Izuku said, tears coming to his eyes as his psychotic powers wore off. "In the end… I couldn't be special."

"Deku…" Bakugo said before taking a large breath and sighing. "You're more than special…"

"It pains me to admit…" Mina started. "But your wit and strength far exceeds ours. We only defeated you by teaming up… I was honestly… envious of your natural ability. It was frustrating to see how much I trusted you…"

Momo nodded "I have no intention of forgiving you for deceiving us and almost killing Todoroki, but… I sympathize with you. I wholeheartedly understand wanting to get back at the people who've taken from you…"

Tokoyami continued, seeing that Momo had trouble saying it "But when you gained the power to fulfill that desire, you only used it for your own self-benefit."

Uraraka continued after Tokoyami "Since you have the ability to use two Quirks, you probably have a similar ability to Todoroki. But because you went through life alone, the power you awakened was fuelled by lies and hate… Still, you thought that was enough, right…?"

Tokoyami resumed "You excelled at everything over us… yet that was the one thing you lacked."

Bakugo just stood still, watching his childhood friend's eyes go wide. "All right, let's go back already. Come with us, De- Izuku… We're gonna take that bastard down. What are you gonna do?"

Jiro nodded "It would be a problem if you kept getting in our way. Wanna come along and help us settle things?"

Izuku looked at them "…Are you all idiots? You should get rid of me… if you don't want me getting in your way." After a few seconds of them not responding Izuku started to chuckle weakly. "…You all are truly beyond my comprehension."

Izuku turned around to see another version of him walk towards him. The others gasped too, but Izuku knew what this was. One of his father's newest Quirks allowed him to create clones of others, but they don't act like the original, they act like the use's perception of the person.

The Fake Izuku picked up the pistol that Uraraka dropped when she first got thrown away and aimed it at Izuku. The Fake Izuku had blank, empty eyes that looked over to them "…I'll deal with the rest of you later." The fake Izuku looked back down at the real one "Boss' orders… He has no need for losers. Well… this just moves the plan up a little. He was planning to get rid of you after All Might's death anyway."

"What…!?"

"Did you truly believe you'd be spared after all the murders you undertook? Don't tell me… were you actually feeling good about having someone rely on you for once? Oh by the way, the Boss says it's time for you to receive retribution for causing the mental shutdowns."

"The fuck!?" Bakugo roared "That bastard's the one who put him up to it!"

Izuku chuckled as he stood up "…I see… I was wondering how he'd protect himself if I used my Quirk to tear through his mind. Turns out your how. So he's making a puppet kill me… Sounds like something he'd do."

"That's right. I'll do anything. But look at yourself… you're the true puppet. You wanted to be acknowledged, didn't you? To be loved? You've been nothing but a puppet from the very beginning."

"You bastard…!" Bakugo roared.

Jiro stomped and called out to Izuku "It's not too late, we can still defeat him together! Even if he's your father… No, because he's your father!"

Fake Izuku looked over to them, his face twisting into a horrible amalgamation of what Izuku looked like when he was insane "What's all this nagging about…? Want me to take care of you first?" In an instant, over thirty Nomus appeared behind the Fake Izuku. "You know what? I'll let someone volunteer to take his place. Who knows, you might delay his death. You guys are all about doing things for others, aren't you? Oh, that's just the same as me. I'm going to take a fall for our boss, I'll die for him too." Fake Izuku stares at Izuku "Here, I'll give you one last chance. Shoot them."

"Hehehe… I was such a fool." Izuku said before he pulled out another pistol and aimed it at Bakugo.

Fake Izuku laughed "Yes… That's the you the Boss wants to see."

Izuku laughed weakly alongside the Fake Izuku "…Don't misunderstand. You're the one who's going to disappear!" Izuku turned his gun around and shot the Fake Izuku in the gut, making him clutch his bleeding stomach and fall to his knees.

Izuku then turned his gun on Bakugo again and fired.

Bakugo stood still as the bullet went past his ear and cut off a few hairs before it slammed into a control panel. An alarm went off, drawing everyone but Bakugo's attention. The boy just kept staring at the two Izuku's.

Bakugo gasped when an extremely thick All Might resistant wall rose up from the ground and blocked them off from the two Izuku's.

"IZUKU!" Bakugo screamed, slamming his fists on the wall.

Hurry up and go." Izuku's voice rang out.

Tokoyami had Dark Shadow ram into the wall to no effect "You fool! Are you trying to get yourself killed!?"

Izuku laughed "The real fools… are you guys. You should have just abandoned me here a long time ago… You would have all perished… if you tried to face these with me weighing you down…"

"Izuku-kun!" Momo screamed through the door.

"Let's make a deal… OK? You won't say no… will you? Kill All For One… in my stead… End his crimes… Please…!"

Todoroki let a single tear out "I promise." He said, looking to see Bakugo with his head against the wall, trying not to cry but unable to stop the tears as they flowed down his face. No one said anything to him, they knew what this meant to him.

"You bastard…!" Fake Izuku screamed as he stood up and pointed his gun at Izuku, who followed suit.

"So, my final enemy is a puppet version of myself… Not bad."

"Izuku-kun!" Jiro screamed at the door.

Two shots rang out.

"No…" Momo whispered so herself as she collapsed to her knees.

Aiba turned away, not letting them see her own tears "Come on you guys! We can't let a rotten criminal like All For One do whatever he wants anymore! We can't… no matter what!" Her sadness could be heard in her voice.

Everyone looked down, before they nodded and continued running towards All For One. Bakugo stayed behind for a minute, crying for his childhood friend.