Answer:
Blade to blade I always win My foe laid low and even. Yard by yard through thick and thin I'm busiest in season.
What is black when you buy it red when you use it and gray when you throw it away?
I can be cracked made told and played.
I am the key that is the hardest to turn
I am a caribbean shape that makes ships disappear
Black we are and much admired. Many seek us if they are tired. We tire the horse, and comfort man, and turn White when we've fulfilled your plan.