"You've got a visitor." The guard's voice was unnecessarily loud.

All For One moved his head towards the door. It was all the movement he could get away with. He couldn't see anything, if he tried activating a quirk then... The sensors were too good, even if the quirk was passive, the sensors were all trained on him. All day, every day. They never rested. He sighed. "All Might again?" He thought he'd dealt with that one.

"No, someone else," the guard said and All For One heard the door open. That was a surprise. No visitor was allowed to actually get close to him. Even those tending to him didn't enter the same room. There were several taps implanted into his body and those who administered them weren't even in the same cell. The tubes went upwards, into the ceiling. They were above him. Separated. His cell was cleaned by drones.

For someone to actually come into his cell... That was interesting.

"Be polite," the guard warned.

"I'm always polite," All For One replied as he heard approaching footsteps.

"That's enough."

All For One stiffened imperceptibly. He knew that voice. It had been years since he'd heard it but he knew it.

"You can go now." The instruction was soft. All For One smiled. He could hear the power.

"But-" the Guard objected.

"It's okay, you can trust me," more power laced the tone. All For One heard the guard leave, and the door close.

"You've gotten good with that," All For One commented.

"You expected nothing less," came the relaxed reply.

He grinned. He had expected nothing less. He had gotten nothing less. "So why have you come?"

"Let's call it nostalgia," his guest said.

"Nostalgia?" All For One chuckled.

"It's as good a reason as any," came the reply.

"You've gotten far more bold."

"Necessity."

"True, and we both know that there won't be a record."

He couldn't see, but he could imagine the smug smile his guest gave him. "Of course not. I visited the facilities but I never visited you."

All For One nodded. He had taught this one well. And from the smug tone of voice, and their very presence here, he knew that things were going well. "Is everything achieved?"

"There's just one outstanding issue," the reply was smooth.

"Oh?"

His guest chuckled. "You always were so expressive, Sensei. I wonder what people would think if they knew I learnt all my oration skills from you?"

"You flatter me."

"Always, Sensei, always." His guest sighed. "You know, those years ago, on that roof, I would never have believed the world to be so fragile."

It was All For One's turn to laugh. "Society is only ever as strong as its foundations."

"And the foundation was crumbling."

He nodded slightly, aware that even if this record would be erased, he was still being monitored, so he couldn't move much.

"Then I drove a sledge hammer into those foundations."

"And look where it's gotten you."

"Oh, I am Sensei. I am," there was a touch of awe in his guest's voice. It reminded him of a child that was full of wonder, a child he had seen only in brief moments. A child who was gone.

He got the feeling that his guest had come to some sort of conclusion. "I guess I came today to thank you. While I doubt everything has gone quite as you envisaged, you were never one to stick to a plan when something else presented itself."

"Of course not," All For One agreed. "Besides, I left the world to my apprentices, when it was time for them to learn on their own."

"You did. I was upset about it at the time, but I see now it was for the best. Tomura couldn't have grown with you there. You gave him guidance, and then he took his own path. If you'd been there for longer, he would have been too predictable."

"And you," All For One said.

"And me," his guest sighed his agreement. "And me," he repeated. "Though I still have a ways to go."

"Hmm?"

"There are no heroes anymore, and correspondingly, there are no villains."

"You've done well. You've both done well," All For One praised his guest.

"Thank you. Though as I said, there is just one outstanding issue."

The tone was unexpectedly cold. All For One froze, and then he felt a slight burning from his arm. He jerked. The monitors beeped in warning.

"You are feeling it now, aren't you?" His guest questioned solicitously.

All For One grinned. He wasn't sure exactly what it did, but he had a few thoughts. It wouldn't kill him. That would be too obvious, and his guest wouldn't risk that. It would be something else, something far more subtle. He was the one outstanding issue but not for long. It made complete sense. To maintain the new status, there could be no risk of the original super villain returning.

"Oh, Izuku, my boy," All For One breathed, "you never cease to amaze me."

"Heroes aren't the only ones who are cruel," Izuku said and All For One heard him move away.

All For One recognised that line. He grinned, and then snorted before he laughed and laughed and laughed as something burned through his veins and the door opened to let Izuku out.

The future was in good hands.