Answer:
Hard to catch, easy to hold. Can't be seen, unless it's cold
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.
My first is high, My second damp, My whole a tie, A writer's cramp
Scythe of darkness, Shadow’s light. Guiding eye of thirteenth sight.
This is in a realm of true and in a realm false, but you experience me as you turn and toss.
Of these things - I have two. One for me - and one for you. And when you ask about the price, I simply smile and nod twice.