The Answer will be Carpet.
Blade to blade I always win,
My foe laid low and even.
Yard by yard through thick and thin,
I’m busiest in season.
What am I?
You are surrounded by a 100 foot wide and 100 foot deep moat. You have a 40 foot tall ladder, matches, a gallon of water, and as much rope as you need.
How can you get across the moat?