MHA Story And Quirk Ideas

Quirk: A Book's Blade

Izuku gets Asta's Grimoure as a quirk.

Here are the Grimoure's limitations:

You could make Libe be in his quirk or you could say he doesn't exist, its your choice. But if he does, he is a summonable similar to Tokyoami's Dark Shadow [That is able to separate from Izuku] or a guide that lives in his mindscape and can speak to Izuku through telepathy or some shi*.

It absorbs swords. Literally. However when it does, it infuses them with Anti-Quirk Energy and places an image of the sword as well as the quirk's knowledge of it on it's avaliable page. It can be a toy sword or a real one. If it's a toy sword, the Grimoure transforms it into a real one [with real weight! He needs some muscle to weild them!] and; using the quirk's owner's knowledge of it, the sword's abilities as well. When a sword is absorbed and processed, then a new; blank page is created in the book to absorb a different one. (This is an infinite process so infinite pages) The information in the Grimoure is only readable to Izuku; to anyone else it looks like either gibberish or a Cypher (depending on the person's intelligence)

For instance, if Izuku got his hands on a toy Master Sword, the Grimoure searches his mind for the Master Sword's abilities and applies them in an Anti-Quirk way. So instead of firing Energy Beams at full health, it'll fire Anti-Quirk Beams. If the Master Sword was absorbed without the knowledge of it, it is just a regular sword until the knowledge is obtained. This leads into the next paragraph. (Imagine a sword that emits flames. Anti-Quirk Flames!)

If it is just a plain toy sword or an actual sword (AKA it has no abilities other then just being a sword) then the Anti-Quirk Energy flowing within it is much stronger. If an ability is found for it, it expends some of that energy to create it and it updates the Sword Page. If the page is filled out on both sides; then no more abilities can be added. So there is a limit. (Thanks Mei!)

If an object is created through use of a quirk, then an Anti-Quirk sword is able to hit or slice through it no matter what it is. (AKA Momo's staves, Kirishima's Hardening; Cementoss' cement [unfortunately] etc etc) (you decide if Momo creating a sword and giving it to Izuku allows it to create Anti-Quirk Items for Izuku's Lipids or if it simply dissolves in the Grimoure due to the Anti-Quirk energy)

If a person has a quirk and tries to weild one of the Grimoure's Swords then their power gets completely drained and they get slower and slower the more they hold it (or the longer it is lodged in them, if you swing it that way) this means that only Izuku and the Quirkless can weild one (other than Aizawa, as his quirk factor is a negative one in his eyes); and if AFO tried to steal his quirk it would only hurt his quirk factor and Izuku's quirk would act like a better version OFA in that it wouldn't be stolen.

Speaking of OFA, you can choose if they can interact with each other.

OFA is a stockpiling quirk first and foremost, so if it was given to Izuku then it would transform from physical strength to Anti-Quirk Energy instead (So it would force his his body into an Anti-Quirk body when it's activated, kinda like the Devil's Arm from the most recent episodes of Black Clover's anime) and the previous users' quirks would turn into swords that function like the Anti-Quirk versions of themselves when held by Izuku, but normal swords when held by others. (Anti-Quirk Blackwhip!)

You can choose if Daggers can be absorbed into the Grimoure and what it deems "A Sword"
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Story:

It manifests in the middle of class at preschool. At first, everyone thinks his quirk is just to summon a book. (So he gets that bullying option that shapes him to be who he is; when he discoveres what his quirk really does you get to decide if the bullying continues or not!) Even the Quirk Doctor! Unfortunately the pages delete all writing on them.

You decide how he discovers the Sword Absorbtion side! (I just say that he gains a toy/real sword obsession later on and accidently hits his grimoire with one and it absorbs it; but it's your choice)

Believe it or not, that's it for my storyline ideas!