I feel like I'm supposed to remember who this Dre guy is

Urine can be used to make potassium nitrate for gunpowder. Does that make a musket a pee-shooter?

You must strike like a ninja turtle, unexpected and undetected.

A counter to keep track of your kills, right?

"immune" LOL!!! You have no clue how vaccines work if you're using the word "immune"