Answer:
I have a neck but no head. I have a body but no arm. I have a bottom but no leg.
They're up near the sky, on something very tall. Sometimes they die, only then do they fall.
I cost no money to use, or conscious effort to take part of. And as far as you can see, there is nothing to me. But without me, you are dead.
Often held but never touched. Always wet but never rusts. Often bits but seldom bit. To use it well you must have wit.
A slow, solemn square-dance of warriors feinting. One by one they fall, warriors fainting, thirty-two on sixty-four.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?