Answer:
A dragons tooth in a mortals hand I kill I maim I divide the land.
I can be sweet or sour. I do not rhyme with any other word
No matter how little or how much you use me, you change me every month.
I am always coming but I never arrive. What am I?
My teeth help me suck.
I touch the Earth, I touch the sky, but if I touch you, you’ll likely die. What am I?