Answer:
I am a fire's best friend. When fat, my body fills with wind. When pushed to thin, through my nose I blow. Then you can watch the embers glow.
Goes over all the hills and hollows. Bites hard, but never swallows.
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.
A hill full, a hole full, yet you cannot catch a bowl full.
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?