Answer:
I am always hungry, I must always be fed. The finger I lick will soon turn red.
Tool of thief, toy of queen. Always used to be unseen. Sign of joy, sign of sorrow. Giving all likeness borrowed.
White bird, featherless, flying out of paradise. Flying over sea and land. Dying in my hand.
What can be measured but not seen?
What kind of room has no windows or doors?
My days are numbered. What am I?