14th of July - The Midoriya residence.

Izuku Midoriya was like any normal child the day his fourth birthday came around. He spent the night before his birthday sprinting around his living room dressed in his favourite silver age All might onesie shouting his favourite phrase of all time, "You have nothing to fear because. I AM HERE" in his best All Might impression.

After an hour of running around he finally falls asleep spread across his living room couch, much to the delight of one Inko Midoriya who carried her child in her arms to his bedroom. Once there Inko tucks Izuku up in his All Might Blanket with his head on his All Might pillow and whispers to her sleeping child "Tomorrow we will head to the doctors so you can finally see what your quirk is so you can be a hero like All Might". What Inko didn't know is that she would heading to the doctors because of what is going to happen while Izuku sleeps.

Time skip (2 am)

While Izuku sleeps peacefully, unbeknown to him his quirk is beginning to change the way his mind works. It starts by putting Izuku in a small comatosed state to allow the changes to be made to Izuku's mind without him waking up which could cause adverse effects to his mental stability and his overall mental progress in life.

The first thing his quirk does to change Izuku's mind is to add an independent subconsciousness to allow the developing child to slowly grasp his power when he is ready for it.

A/N will give gender later but will refer to as "it" or "the subconsciousness" when referring to it.

"Well, Let's get started shall we" The subconsciousness says to itself as it looks into Izuku's mind, deciding what changes to grant Izuku. "Wow there's a lot here on this all might person, maybe it's his father or maybe just someone he looks up to." As it sifts through Izuku's memories it sees all the things Izuku has thought about heroes. From what his quirk might be to ways they could be effective.

"I'm definitely working with a stupidly smart kid who loves his superheroes, especially how to improve the way they fight and can be useful. Do I make his quirk into one like this All Might character? Na that would be way too easy. I want to make this kid into the best version of himself and what he loves." as the subconsciousness thinks about what he should do a eureka moment as it begins to make his changes.

Before the subconsciousness lay thousands of dials and switches corresponding to different things about Izuku's mind and body. It dashes over to the dials and switches relating to his mind, specifically his IQ and cranks it to just over 3/4 of the way to its maximum and says to itself "we can't have him too smart now can we". It then flips a switch next to it labelled 'Photographic Memory'. The subconsciousness' next plan of action was to find the dial relating to Izuku's mental capacity, once there the subconsciousness questioned itself for a moment and asked itself "How much should I allow this child to remember about everything?" and instantly answered itself with a firm "Screw it, let's have some fun with this". Going over to the dials for Izuku's eyes there was a switch the subconsciousness quickly flipped two switches labelled 'Perfect Sight' and 'Zoom'.

Out of all the thousands of switches and dials in front of the subconsciousness one section stood out the most was one set of labels labelled "H.U.D", this peaked the subconsciousness's curiosity as it began to head to that area to see what it could do to help the child. Once there it saw all of its options 'Map', 'Entity Data', 'Personal Information' and 'Crosshairs'. Deeming the map and crosshairs irrelevant to izuku he leaves them but not without turning Entity data and Personal Information on.

"That seems like everything, lets output these changes. I'm sorry if this hurts but this is for you" the subconsciousness said softly as it leaves the console, allowing the changes to be made.

Meanwhile outside of Izuku's mind

Inko Midoriya shot out of bed in a cold sweat, she decided to get out of bed to check what the time is. The alarm clock in front of her shows 2:00AM as she thought "Happy birthday Izuku" as she went downstairs for a glass of water as she knew she wasn't going to be able to go back to sleep right away. As she walks towards the kitchen, she glances towards Izuku's room as she could hear a faint noise from the room, pushing the door open she can see her little Izuku making faint noises while staying completely still... a bit too still for her liking.

"Izuku?" she says as she gives him a small push to attempt to wake him up. Nothing. "Izuku?" she pushes him again but again... nothing. She begins so shake him more but still nothing so she does the only thing she can. Call an ambulance as quick as possible.