Answer:
A dragons tooth in a mortals hand I kill I maim I divide the land.
What gets bigger when more is taken away?
I am an English word that is as long as I am valued. What am I?
I contain six letters minus one and you got twelve.
Everyone in the world needs me. They generously give me but never take me. What am I?
Runs over fields and woods all day. Under the bed at night sits not alone, With long tongue hanging out, Resting at your feet until we go for a walk