Answer:
I am the greatest teacher out of them all, but alas in the end I kill my pupils.
What can be underwater, under fire, on fire and taking water all at the same time?
I have split the one into five. I am the circle that few will spy. I am the path that breaks and gives. I am the bow no man may bend.
Bright as diamonds, Loud as thunder, Never still, A thing of wonder.
My life is often a volume of grief, your help is needed to turn a new leaf. Stiff is my spine and my body is pale. But I'm always ready to tell a tale.
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.