Answer:
What goes in the water red, and comes out black?
My life can be measured in hours. I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.
I can be written, I can be spoken, I can be exposed, I can be broken.
I march before armies, a thousand salute me. My fall can bring victory, but no one would shoot me. The wind is my lover, one-legged am I. Name me and see me at home in the sky.
I'm full of holes, yet I'm full of water.
What is so fragile that saying its name breaks it?