Answer:
I have an eye but cannot see, You'll head inside when you see me.
Two bodies have I, though both joined in one. The more still I stand, the quicker I run.
A box without hinges, lock or key, yet golden treasure lies within.
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.
Long and slinky like a trout, never sings till it's guts come out.
I go in hard, come out soft. Blow me hard and I'll make a pop. What am I?