Answer:
I transfer oxygen from the atmosphere to your blood
The faster you run the harder it is to catch me
First I may be your servant's name; then your desires I may proclaim; And when your mortal life is over hold all your wealth within my power.
What do you call a three humped camel?
When you take away the whole from me there is always some left.
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.