Answer:
Digital white-out.
A trail, a union, together tied. Come across me and you will find you cannot change the course I'm on. Without me you cannot travel on. What am I?
lighter than feather and softer than silk yet the strongest man in the world cannot hold me for more than a few minutes.
I go up but never come down. What am I?
Although glory but not at my best. Power will fall to me when the man who made me dies.
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.