Replying...
Intro. Do whatever you want in it! Takes place in an exoplanet that has frozen over and lost all biological life! (A murder drone: has a tail that looks like a needle and has sharp wing,Can be any color,tails contain a syringe that injects nanite acid into targets. The nanite acid is a corrosive substance that can dissolve many materials.) (a worker drone: Worker Drones These autonomous robots are created to mine exoplanets for resources,can be any color.) etc,Do what you do!!! There's more but you can research it.

MURDER DRONES!!

@Shad