Euthanize

Vor a creature of mass destruction comes upon our solar system looking to cause mayhem. It goes to the nearest planet full of life.. destructive life. So it's time to fight fire with fire and destroy everything that causes pain (it's not gonna kill itself). Well I guess you'll have to read this dumb story to get more information about Earth's little encounter with my monstrous creation :/ I don't know it's dumb :|