Answer:
Only two backbones and thousands of ribs.
What's a place you have left but didn't enter?
If I have it, I don't share it. If I share it, I don't have it. What is it?
Reaching stiffly for the sky, I bare my fingers when its cold. In warmth I wear an emerald glove and in between I dress in gold.
Scythe of darkness, Shadow’s light. Guiding eye of thirteenth sight.
What is so fragile that saying its name breaks it?