Answer:
The higher I climb, the hotter I engage. I cannot escape from my crystal cage.
A thousand colored folds stretch toward the sky. Atop a tender strand, rising from the land, until killed by maiden's hand. Perhaps a token of love, perhaps to say goodbye.
When I live I cry, If you don't kill me I'll die.
What moves without seeing and cries without eyes?
With pointed fangs it sits in wait. With piercing force it doles out fate, over bloodless victims proclaiming its might. Eternally joining in a single bite.
You use it between your head and your toes, the more it works the thinner it grows.