Answer:
A single syllable do I claim black was my most famous name; Fetal to mortals here below thousands have I slain in a single blow.
You write on me and secrets I can keep in places never seen. I spin like a top. Though stiff as a board, I'm often described like a mop. What am I?
They come out at night without being called. They are lost in the day without being stolen. What are they?
What has feet and legs, and nothing else?
I am the kind of soda you must not drink. What am I?
What language does a billboard speak?