A plot for this fanfic could be that Izuku discovers his sand quirk at a crucial moment during a battle. From then on, he starts to train intensively with it. The story could focus on his growth as a hero with this new quirk. He might have to participate in special training sessions designed for quirks like his. There could be a tournament arc where he shows off his new abilities. However, he also has to deal with the fact that some people are skeptical of his sudden change in quirk, and he has to prove himself not only to his enemies but also to those who doubt him.
A fanfic with Izuku having a sand quirk could explore his new power dynamics. He would have to adapt his fighting style completely. Instead of using his original strength - based moves, he'd rely on the versatility of the sand. He could potentially use the sand to travel, like surfing on it. His relationship with other characters might also change. For instance, Bakugo might be even more envious of this unique quirk. And Izuku would have to learn how to use it subtly, perhaps by creating small sand particles to gather information without being noticed.
Well, perhaps a major plot twist could be that Izuku's All for One quirk is actually a modified version created by some secret organization. This organization wants to use Izuku as a weapon. As he uncovers this truth, he has to not only deal with the power of the quirk but also fight against the organization that manipulated him into having it. This would add a whole new layer of mystery and danger to the fanfic.
In many 'izuku healing quirk fanfic', the way his quirk interacts with other characters' quirks is fascinating. For example, if another character has a self - destructive quirk, Izuku's healing quirk could have a unique way of countering it or working in harmony with it. Also, the discovery of new aspects of his healing quirk during intense battles or crises can be a major plot point that drives the story forward.
One interesting plot twist could be that Izuku initially struggles to control the All For One quirk. Since it's a very powerful and complex quirk, he might accidentally absorb quirks from his friends or allies, causing a rift between them. For example, he could absorb Uraraka's zero - gravity quirk and she feels violated. Another plot twist could be that the League of Villains, thinking Izuku is now one of them because of the All For One quirk, try to recruit him. Izuku has to pretend to go along with them to gather intelligence, but it becomes a dangerous game as he risks being corrupted by their ideology.
With his classmates, some might be scared of Izuku. They've known him as a kind - hearted person, but the All for One quirk has such a dark reputation. However, some like Ochaco might try to understand him better and support him through his journey with this new quirk. His relationship with the teachers would also be under scrutiny. They would need to ensure that Izuku doesn't use the quirk for evil purposes, which could lead to a lot of extra monitoring and a sense of unease in their interactions.
His relationship with All Might would become extremely complicated. All Might, who passed on One For All, would be shocked and perhaps a bit disappointed that Izuku now has the All For One quirk. He might question his decision to choose Izuku as his successor. With Bakugo, their rivalry could take a different turn. Bakugo might be both envious and afraid of Izuku's new power, leading to more intense confrontations. And with his friends like Iida and Ochaco, they might be initially hesitant around Izuku, not knowing if he can still be trusted with such a villainous - associated quirk.
In 'bnha rubber quirk fanfic', one unique aspect is how the rubber quirk interacts with the BNHA world's physics. Since the world has its own set of rules regarding quirks, the rubber quirk often defies normal physics in interesting ways. For instance, the elasticity might be used to store and release energy in combat. Also, the social implications are unique. A character with a rubber quirk may face different types of reactions from others, ranging from admiration to ridicule. And often these fanfics explore how the character overcomes such social hurdles while also mastering their quirk.
A plot could involve Female Izuku being part of a secret group that has Titan Quirks. They are being hunted down by an evil organization that wants to use their powers for their own malicious purposes. Izuku has to use her wits along with her Titan Quirk to outsmart the bad guys and protect her group.
First, focus on her insecurities. Despite having a powerful Titan Quirk, she might still doubt herself like the original Izuku. She could worry about losing control and hurting those she loves. Show her working hard to master her Quirk in private, constantly pushing her limits.
A sense of isolation can be a theme too. Having a unique dragon quirk might make Izuku feel different from others at first. He could be ostracized or misunderstood by some of his peers. But then as the story progresses, he finds ways to connect with others and use his quirk for the greater good, turning that initial isolation into a strength.