Answer:
My first is in wield, sever bones and marrow. My second is in blade, forged in cold steel. My third is in arbalest, and also in arrows. My fourth is in power, plunged through a shield. My fifth is in honor, and also in vows My last will put an end to it all.
A word I know, six letters it contains. Subtract just one and twelve remains.
What is that you will break everytime you name it?
What goes around and around the wood, but never goes into the wood?
A leathery snake, with a stinging bite. I'll stay coiled up, unless I must fight.
What covers its face with its hands, speaks no language, yet most known what it's saying?