Answer:
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.
Take one royal word in the plural and make it singular by adding one letter
I am the first you ever saw, what greets you every morning and what goes out in the end.
Can describe a distress signal or flashy accessories.
I can be found in seconds, minutes and centuries, but not in days, years or decades.
Why did Superman flush the toilet?