Answer:
My first is in wield, sever bones and marrow. My second is in blade, forged in cold steel. My third is an 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.
I tremble at each breath of air, and yet can heaviest burdens bear.
My first master has four legs, my second master has two. My first I serve in life, my second I serve in death. Tough I am, yet soft beside. Against ladies cheeks I often reside.
I crawl on the earth. And rise on a pillar.
The eight of us move forth and back. To protect our king from the foes attack.
What language does a billboard speak?