Answer:
A dragons tooth in a mortals hand, I kill, I maim, I divide the land.
No matter how little or how much you use me, you change me every month.
It is weightless, you can see it. If you put it in a barrel it will make it lighter?
I have four wings but cannot fly. I never laugh and never cry. On the same spot always found, toiling away with little sound.
I have split the one into five. I am the circle that few will spy. I am the path that breaks and gives. I am the bow no man may bend.
What is yellow, looks like the moon and has seeds?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?