Answer:
I have a head and a tail but no body. What am I?
I cut through evil like a double edged sword and chaos flees at my approach. Balance I single-handedly upraise through battles fought with heart and mind instead of with my gaze.
My days are numbered. What am I?
I can fly but I have no wings. I can cry but I have no eyes. Wherever I go darkness follows me.
I have a head but never weeps. I have a bed but never sleeps. I can run but never walks. I have a bank but no money. What am I?
No matter how little or how much you use me, you change me every month.