Answer:
A dragon's tooth in a mortal's hand, I kill, I maim, I divide the land.
What has two spines and a lot of ribs, and carries much but never moves?
A precious fluid, thicker than water.
A man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?
The more you take, the more you leave behind.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?