The 13 elements of existence are Fire, water, earth, air, metal, lightning, wood, light, darkness, ether, eternity, life and death correct?

i don't really have an answer cause everytime tend to find out... the periodic meja is always the case. But i think you're right:)

Oh, this reminds me on the anime Uta Kata. For me the elements are fire, water, air and earth, but the others are good, too. I can't give anda a correct answer.

There are many variations of the elemental system, and I think anda got one.

I prefer to use the five elements system;
Earth, water, fire, air, light/power

But, I tend to divide them in a moon/sun.
But then again, that is just me and this weird dream I once had.