Bullet by Hollywood Undead
https://youtu.be/lP077RitNAc?si=RCKwIm8cV8xQ1mG0
I don't think its possible for a song to be more upbeat and dark at the same time as this. I don't know if I can even type what it's about.
Your knowledge of scientific biological transmogrification is only outmatched by your zest for kung-fu treachery!