Answer:
You need a key to receive an answer from me. The answer you'll find is straight from your mind. What is it?
A muttered rumble was heard from the pen, and I, in my walking stopped to look in. What was this I saw? A massive beast, hoofed, and jawed. With spikes upon its mighty brow, I watched as he struck the turf and prowled. And yet for all of his magnificence, he couldn't get out of that wooden fence.
What goes around and around the wood, but never goes into the wood?
Glittering points that downward thrust. Sparkling spears that never rust.
In the evening I'm long, in the morning I'm smallΝΎ When seen in a ballroom, I'm nothing at all.
You use it between your head and your toes, the more it works the thinner it grows.