My Hero Academia: Seek and Destroy [Reader Insert]

Being at the wrong place at the wrong time leads to you coming face to face with a dying villain. In a last effort to achieve his goal, he offers you his quirk so that you can use it to get into a pro hero school. The catch?
You must use it to kill the fiercest hero in all of Japan.
Armed with an incredibly dangerous quirk that risks destroying your body, you set out to fulfill this request despite your passion of becoming a true hero.

{Content Warnings: blood, violence, identity issues, mild body horror, abuse mentions, neglect mentions, Endeavor, unhealthy coping mechanisms, light sadism}

A/N: The tags make it seem worse than it really is. It's not that bad, very typical stuff of my hero academia. If you can handle the show you can handle this story