Kaosu kaibutsu (Chaos Monstrosity): Izuku’s rewrite

Izuku Midoriya gets thrown back into the pre-quirk era after facing off against all for one earlier than expected. After going rogue and becoming a vigilante after the war. He along with the legendary quirk of One for all has to defend the city from villains that appear throughout time portals to kill him off whilst also trying to find a way back to his Era to stop all for one.