Answer:
Blade to blade I always win My foe laid low and even. Yard by yard through thick and thin I'm busiest in season.
Marking mortal privation when firmly in place. An enduring summation inscribed in my face.
In many hall ways you would stand if not with me in hand.
What comes once in a minute twice in a moment but never in a thousand years?
I am a band that does not perform, sing, or act. What am I?
I flow from the Homerβs mouth when he sees doughnuts.