Answer:
Sometimes I fly as fast as the speed of light. Sometime I crawl as slow as a snail. Unknown until I am measured but you will certainly miss me when Iβm gone.
I am a type of weapon for SCI-FI characters
Feed me and I live. Give me water and I die. What am I?
I am shared by goats devils and unicorns.
Late afternoons I often bathe. I'll soak in water piping hot. My essence goes through. My see through clothes. Used up am I - I've gone to pot.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?