Answer:
Man walks over, and man swims under. In times of war, it can be burned asunder. What is it?
With pointed fangs it sits in wait. With piercing force it doles out fate, over bloodless victims proclaiming its might. Eternally joining in a single bite.
My first master has four legs, my second master has two. My first I serve in life, my second I serve in death. Tough I am, yet soft beside. Against ladies cheeks I often reside.
Though I wander the earth, I am no longer here. I am pale and I chill everyone near. Who am I?
Long and slinky like a trout, never sings till it's guts come out.
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.