The quirk their hero: arsenal

The outcome

Afo  teleported  30yards away from the hero and activated one of his massive destruction quirk. He made sure to limit the power only to the heroes so he doesn't accidentally kill his son. Massive flame pillars erupted from beneath the heroes which forced the heroes to jump. Afo expected this and threw blades at the heroes in air. The heroes who weren't used to multi quirk villains, fell to afos attack. While some of the veteran heroes knew of afo and immediately dodged the incoming projectiles. When the flames dispersed, the heroes saw nothing but smoke. The heroes knew afo had escaped from their grasp and that they couldn't do anything about it. The heroes weakly left this area and decided to come back later.

Izuku woke up at 6 am, not aware of what had just happened. Izuku got up from his bed to realize he was a bit taller. Izuku turned his head left and wondered how. Izuku just blamed growth spurt and was about to leave downstairs. When izuku was walking, he saw a note on his desk. The note read,

'Izuku. I hate to bring it down to you and your mother like this but dad have to go. Dad won't be able to see you again. Dad is a villain. The strongest villain at that. But remember dad loves you. Dad has a quirk named all for one. This quirk can take, give and combine quirks. And izuku, you have a quirk strong enough to absorb afo to your self. Yes izuku. You have a quirk. One of them is afo while the other, even I don't know. I hope you become a great hero and remember dad loves you'

Izuku was shocked hearing his dad was a villain but then pieced everything together. The business trips were him doing bad deeds. Reason why he watched the hero network with izuku all the time with notes were to find the heroes weakness. Izuku was at a loss for words. Izuku then sticked his hand out and tried afo. Suddenly, a black glow came out of his hand. It felt like as if the black Light will absorb anything. And his sudden height growth? Probably his dormant quirk.

Izuku quickly calmed him self down and went downstairs. There he saw his mother on the table, crying. Could she also have gotten the letter?

"Mom, Why are you crying?"

Inko looked at izuku with her green eyes and wiped her tears off.

"It's nothing izuku. Just, dad won't be here anymore. Your dad passed away"

Izukus eyes widened. Then what about the letter? His mother couldn't have done that. Did his dad faked his death? Well that made sense. Izuku played along with this and hugged his mother. Inko teared up and cried.

About 2 hours later a knock on the door came. Inko rubbed her teary eyes and opened the door. In front of her was a detective and the ever growing hero, all Might.

"H-hello?" Inko said hesitantly.

Why is a hero here? Is it because of her husbands passing?

"Hello miss midoriya. Do you mind if we come in?"

The detective asked.

Inko, a bit hesitant but allowed them in.

Inko expected izuku to be all kind of glowed up and excited but when she looked at her son, he was scared.

Inko told izuku to go to his room and he did that.

Izuku partially left but heard everything they were talking about.

The detective asked about hisashi midoriya. His age, quirk, job, height and everything. Inko answered all but asked a question to them.

"Why do you want to know?"

"Well you see. We have leads to know that your husband is a villain. The greatest villan at that"

The detective explained.

Inko, widened her eyes and went into a bit of shock.

"That's not possible. He was such a sweet man. And plus, he's already passed!"

Inko rejected.

The detective and inko kept on talking with inko getting very heated. The detective stayed calm as he knew where she was coming from.

Sadly, inko stopped being angered and started seeing the truth. She started tearing up and cried.

Izuku ran from his spot and went in front of his mom.

"What are you doing to my mom. Move any closer and I'll... I'll steal your quirk"

Both almight and the detective widened there eyes. Izuku closed his eyes as a black glow came from his hand.

"Th-this is all for one!"

Both allmight and detective tsukasa said.

"Stop izuku!" Inko screamed.

Izuku reluctantly dropped his hand and hugged his mom.

Allmight walked closer and kneeled down to izukus height.

"Kid did you know who your father was?"

Izuku looked away and said, "No..."

Allmight knowing he did, did some quick thinking.

"Do you want to be a hero?"

Allmight asked.

Izuku widened his eyes and nodded.

Allmight looked at inko for the signal of approval. Inko smiled looking at izuku and nodded.

"Well izuku. Your quirk all for one won't be useful if you don't take any quirk"

Izuku looked down and muttered a, "I know"

"But you know izuku, you could take a quirk of bad people so they can stop doing there evil deeds"...

- Sorry it's kinda short. It was a draft and I just edited a bit.