A Magician Mixed in with Cyberpunk

They gave me six bullets and a mission to treat my seriously injured sister. In this neon abyss, everyone uses prosthetics and codes to solve problems, but I have to rely on a [Shield Technique] with a wrong style. The company wants to turn me into a dog, the black market wants to dismantle me into parts, and even the "system" in my brain is coldly analyzing every heartbeat of mine. All right. Then let the cybermaniacs take a look at a person who only has a broken gun and a little magic, but dares to protect everything—— How to use their rules to dismantle their chessboard piece by piece. Don't ask me why magic lights up neon. All I know is that my sister is waiting for the medicine, but I don't want to live on my knees.