Answer:
I am what remains when nothing is left.What am I?
A house full, a yard full, a chimney full, no one can get a spoonful.
You need a key to receive an answer from me. The answer you'll find is straight from your mind. What is it?
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.
Different lights do make me strange, thus into different sizes I will change
What is so fragile that saying its name breaks it?