Answer:
A leathery snake, with a stinging bite. I'll stay coiled up, unless I must fight.
When I live I cry, If you don't kill me I'll die.
Brown I am and much admired; many horses have I tried; tire a horse and worry a man; tell me this riddle if you can.
The weapon of choice to create the biggest shock.
A dragon's tooth in a mortal's hand, I kill, I maim, I divide the land.
What is so fragile that saying its name breaks it?
Difficult
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?