Answer:
I am what remains when nothing is left.What am I?
Without a bridle, or a saddle, across a thing I ride a-straddle. And those I ride, by help of me, though almost blind, are made to see.
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.
What can be underwater, under fire, on fire and taking water all at the same time?
As beautiful as the setting sun, as delicate as the morning dew. An angel's dusting from the stars. That can turn the Earth into a frosted moon.
What is always coming but never arrives?