Answer:
I climb higher as I get hotter. I can never escape from my crystal cage.
I am a path between high natural masses; remove the first letter to get a path between man-made masses.
The letter S is added to pluralise most words in the English language. eg. Letter to Letters Word to Words and Language to Languages. But I am a word that is pluralised with the addition of the letter C.
The time between daylight and darkness when blood drinkers like to come out
Take it and you will lose or gain more than the others.
I will disappear every time you say my name.