Answer:
Use me if you really want to see inside someone
I am an English word with 3 consecutive double letters.
What starts with the letter “t”, is filled with “t” and ends in “t”?
I'm a ruler with 12 agents. Half of them work in the darkness. Who am I?
Can not be bought, Can not be sold, Even if it's made of gold. What is it?
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.