Answer:
Face with a tree, skin like the sea. A great beast I am. Yet vermin frightens me.
They made me a mouth, but didn't give me breath. Water gives me life, but the sun brings me death.
What goes around the world and stays in a corner?
My first is in blood and also in battle. My second is in acorn, oak, and apple. My third and fourth are both the same. In the center of sorrow and twice in refrain. My fifth starts eternity ending here. My last is the first of last, Oh Dear.
A dragon's tooth in a mortal's hand, I kill, I maim, I divide the land.
You use it between your head and your toes, the more it works the thinner it grows.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?