One interesting 'izuku has black blood fanfiction' could be where his black blood gives him unique powers. For example, it might have the ability to absorb and nullify the quirks of villains he comes into contact with. This would make for an exciting plot as he'd have to learn to control this new power and face the challenges of being seen as different by his peers.
There could be a 'izuku has black blood fanfiction' where the black blood is a result of a scientific experiment gone wrong. Izuku has to deal with the side - effects of this new condition, like sudden outbursts of power he can't control. His friends at UA might initially be scared of him, but as the story progresses, they learn to accept him and help him harness the power of his black blood.
In some 'izuku has black blood fanfiction', his black blood could be a sign of an ancient lineage. Maybe it's related to a long - forgotten hero or a powerful being from a different dimension. This could lead to a story where he has to uncover his true heritage and the purpose of his black blood while also dealing with the normal challenges of being a hero - in - training at UA.
Another place to find this kind of fanfiction could be FanFiction.net. It has a large collection of My Hero Academia fanfictions, and you might be able to find some great 'izuku has black blood' stories among them. Browse through the My Hero Academia section and keep an eye out for the specific concept.
In some fanfictions, Izuku's black lightning quirk could have unique side effects. Maybe it drains his energy in a different way than normal quirks, leading to him having to find creative ways to manage his power usage during battles. This could add a whole new layer of complexity to his character development.
Some fanfictions might center around a particular event in the series and expand on it. For instance, the battle against the Kowloon Children. The author could add more details about the strategies, the emotions of the characters during the fight, and the consequences that followed in a more elaborate way.
One interesting 'izuku is a dragon' fanfiction could be about Izuku using his dragon powers to protect his friends in new and unexpected ways. For example, he might be able to breathe fire to fend off villains, or use his dragon wings to quickly reach those in need.
One interesting fanfiction could be where Izuku uses the combination of All for One and One for All in unique ways to defeat powerful villains. He might use All for One to take away the quirks of enemies and then use One for All to enhance his physical abilities to an even greater extent than normal.
One interesting story could be where Hiccup's dragon blood gives him the ability to communicate with all dragons on a deeper level, not just Toothless. He can sense their emotions and needs from far away. For example, he might be able to calm a wild dragon during a storm just by using his dragon - blood - enhanced connection.
One interesting plotline could be Izuku using his voice quirk to communicate with animals. Since many animals respond to different frequencies and tones, his voice quirk might allow him to understand and direct them. For example, he could use it to get a flock of birds to create distractions during a villain attack. Another plotline might involve Izuku using his voice quirk to soothe people in distress. His voice could have a calming effect, which would be useful in rescue situations or when dealing with panicked civilians. And a third plotline could be Izuku having to train his voice quirk in secret because it's considered too dangerous or unpredictable, and he has to find unique ways to control and develop it without getting caught by the wrong people.
One interesting plotline could be Izuku using his Pokemon - like quirk to battle villains in a unique way. For example, he might summon Pokemon - inspired creatures with different powers to counter various villain attacks.
The unique power concept. Blood manipulation is not a common power in the original series, so seeing Izuku with such a power makes for an interesting read. It allows for creative battles and problem - solving.
There might be a Zelman fanfiction that focuses on his relationships. For example, his interactions with other main characters in the series. It could show a different side of him, like his loyalty or his conflicts within those relationships.