Rebuttal

Izuku was in critical condition. Eri was doing her best to heal him, but they weren't sure whether he'd die before she finished. Eri's quirk went overboard. Izuku's injuries healed, but he became a 10-year-old, then a five-year-old, then a fetus. Momo and Stain took action and knocked her out while Neri started to fast forward him. Izuku was dying rapidly. As a fetus, he needed certain conditions to live. A shack on the beach wasn't going to cut it. Neri needed to fast forward him to right before he went to the League of Villains' base. Any further and he would die, and Neri had to do it quickly. Izuku couldn't breathe. Neri didn't have that much control. He had to be fast and exact because there was no Eri to rewind him. Neri tried; it was a success. He had done it. In the process, Eri woke up. Momo and Stain didn't want to tell Neri, or else he would get more careless. Eri looked at what she had done to Izuku before Neri healed him. "I did that," she said to herself. Eri looked mortified. She was so scared that she lost control. Eri started to cry. "I did that," she said again. "Never again. I'll never use my quirk again!" She shouted as she ran away.

Izuku woke up to the shout. He saw Neri running towards Eri and the rest of them next to him.

"What happened?" Izuku asked.

"You got hit by All Might. Eri lost control and turned you into a baby that's supposed to be in a womb while trying to heal you. Neri had to step in. She said that she wasn't ever going to use her quirk again. She ran away, crying," Momo replied.

"I have to talk to her," Izuku said, trying to stand up.

"Don't stand up yet!" Stain said, worried about his condition.

"I'm okay. Neri healed me, remember," Izuku said.

He stood up and went to Eri. Eri was sobbing on her bed.

"I'm sorry, Deku-san!" Eri said.

"Sorry for what? You tried your hardest to heal me. Neri couldn't have treated me alone. You helped a great deal. I'm so glad you stepped in. I wouldn't be alive right now," Izuku said.

His smile was like an angel touching her. Izuku hugged her. She could tell it was earnest; that Izuku wasn't angry. She hugged back. She could hug him for years on end.

"Let's go, Eri," Izuku said.

"Okay,"

They went back to the main hideout and discussed the tactics for beating The League of Villains with the team. They decided not to go on daily patrol anymore. They would go once a week. They chose to devote all that time to intense training. They were going to become strong enough to beat the league. Izuku spent half his time in his lab, creating the most potent weapons he could. He upgraded his anti-gravity shoes, making them faster and lighter. He made electric kunai knives. He used the same logic as his electric knife only that they were long-distance and ran out of electricity quicker so that no one could use them against him. Not only that, but he made a dagger that copied quirks when he cut them with it. He didn't want to make too many weapons because he still needed mobility. He also improved his electric dagger so that it contained more electricity.

[A/N: This was over the time of like three months]

Izuku's utilities:

Stain Sword: Contains paralyzation serum that enters your body when it cuts you.

10-hit sword: Uses kinetic energy to become stronger the more you hit with it. It has a limit of ten slashes; then, all the power goes to the gauntlet.

Electric Dagger: Contains electricity, so when it cuts you, 500 volts of static power flow into your body.

Exploding Gauntlet: It comes as a set of two. It makes explosions. One glove makes more concentrated explosions, and the other make bigger explosions; it has different levels of power.

Electric Kunai: Smaller versions of the electric dagger. They are thrown long-range and has up to 100 volts of electricity. Unlike his electric knife, he can only use it once.

Copy dagger: Breaks down components of blood and imitates quirks. It makes the power a bit weaker.

Anti-gravity boots: They defy gravity and make him move 190% faster.

Special suit: It is fireproof and shock absorbing. It absorbs your life force to make a blast 150% stronger than the attack that hit him.

Healing serum: Activates the body's cells and makes a person heal faster.

Eri, Neri, and Momo also improved considerably in martial arts. Izuku was training too. He secretly went out in the night to test his weapons and helped citizens while he was at it. He also had multiple practice matches with Stain and was able to tie with him now. Izuku forgot one crucial fact. He had never taken off the weights Stain gave him when they first met. Once he remembered, he smiled. He had tied with Stain with weights on his arms and legs. He was stronger than his master now, but Stain still had way more experience. Izuku was excited. He was going to get the League of Villains back. He took his weights off. He could move almost as fast as his downgraded anti-gravity shoes. He quickly put them back on and added more.

Eri was agile as well. Her perk was how lightfooted she was. Stain saw this and trained her in hitting pressure points and nerves. Since her hits were weak, she had to attack places that amplified pain. Neri, however, was an all-rounder like Stain. Stain trained him in all aspects of fighting that he knew. He was like a mini Stain, only that their personalities were completely different.

He trained Momo in using different kinds of weapons in different situations. Though Stain only used a sword, he had faced many enemies that wielded different weapons and observed the ones that gave him a challenge. Stain brought the Vigilante Group Ghost into fruition. He made them all decent at fighting.

But he trained too. He didn't want Izuku bragging about how much stronger he was. He practiced because he didn't want his student to become stronger than him, to remain at the top.