Answer:
Kills the bad ones and the sad ones. Tightens to fit, so one size fits.
My first is nothing but a name; my second is more small; my whole is of so little fame it has no name at all.
Twigs and spheres and poles and plates. Join and bind to reason make.
What is eaten but not grown and was born in water but will disappear if soaked?
Scythe of darkness, Shadow’s light. Guiding eye of thirteenth sight.
Why did Superman flush the toilet?