Answer:
Two year-old children who throw tantrums get this nickname. So did the tsar "Ivan."
Without what would everyone lose their head?
Who plays when he works and works when he plays?
What sphinxes employ and players enjoy.
What can be any size or shape and gets bigger the more you take from 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.