Answer:
At first, I am nothing. Add something to negate. Add again to oppose. Add again to find the time to draw. Add once more to find nobody at all.
You saw me where I never was and where I could not be. And yet within that very place, my face you often see.
Mountains will crumble and temples will fall. And no man can survive its endless call.
Gets rid of bad ones, short and tall. Tightens when used, one size fits all.
The strangest creature you'll ever find has two eyes in front and a hundred behind.
What did the piece of wood say when he saw the screwdriver and screws approaching?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?