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.
As round as an apple. As deep as a cup. All the king's horses can't pull it up.
Sharp and long, flag of the world. What is it?
Screaming, soaring seeking sky. Flowers of fire flying high, Eastern art from ancient time, Name me now and solve this rhyme.
A precious stone, as clear as diamond. Seek it out while the sun's near the horizon. Though you can walk on water with its power, try to keep it, and it'll vanish in an hour.
You use it between your head and your toes, the more it works the thinner it grows.