Vigilante Snapper

At the age of 4 years Izuku Midoriya gets his quirk. But that quirk was very villain like. His quirk is called Snap. The quirk can kill everything the user wishes with the snap of a finger. Due to one night of pure terror Izuku accidently snaps his finger and kills someone. After that he thinks he can't be a hero anymore so he becomes the world's most famous vigilante.

I don't own MHA or the characters. I just own the plot.