What if Izuku unknowingly possessed a "sentient" Quirk like Tokoyami's Dark Shadow? Enter Midoriya Izuku, a young boy thought to be Quirkless who subconsciously controls the number one vigilante in Japan; an entity powerful enough to rival even the strongest villains. There's only one small, tiny problem: the entity thinks of him as a big brother. Good luck, Izuku-nii-chan!

After being rejected by All-Might, Izuku takes Katsukis advice and jumps off a building. Only to find that they aren't very good at staying dead. With a strange quirk keeping Izuku from staying dead and forcibly stitching their body back together when it's cut or torn apart, maybe they can become a hero! FemIzuku, UndeadIzuku, Pairing TBA. M cause zombies are messy when blown up.

Living a Quirkless life, Izuku hated All Might for crushing his dreams. But a chance encounter with a certain man gives him power beyond his imagination. Now it's time for Izuku's revenge against the society which he once wanted to become part of. (Villain!Izuku) (I don't own the cover image; credits to whoever made it! Offline version available on my page)