Answer:
I am one with eight to spare, lest I lose my one. I'm not a number. What am I?
Against the sun I protect your eyes and am often worn on the face of spies
I fly forever Rest never.
I widen my jaws when you poke two fingers in me. I especially like to devour papers
In a tunnel of darkness lies a beast or iron. It can only attack when pulled back. What is it?
The answer I give is yes, but what I mean is no. What was the question?