Answer:
A house of wood in a hidden place. Built without nails or glue. High above the earthen ground It holds pale gems of blue.
A dragons tooth in a mortals hand, I kill, I maim, I divide the land.
I am whole but incomplete. I have no eyes, yet I see. You can see, and see right through me. My largest part is one fourth of what I once was.
What can be forever wound up but never annoyed?
I can sizzle like bacon, I am made with an egg. I have plenty of backbone, but lack a good leg. I peel layers like onions, but still remain whole. I can be long, like a flagpole, yet fit in a hole.
I repeat only the last word you say. The more I repeat, the softer I got. I cannot be seen but can be heard. What am I?