Answer:
Up on high I wave away but not a word can I say.
My first half is normally made of stone, my second is crazy, and I taste sweet when complete.
You can always see it, but it's too far away to touch. Mountains rest on it, and at sea it surrounds you. What is it?
They're up near the sky, on something very tall. Sometimes they die, only then do they fall.
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.
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.