From the introduction:
Elementalism: the manipulation of one of the fundamental components, or elements, of the world’s underlying structure. Many settings with a supernatural slant include some variant of elementalism, even if it’s just a creature from hell with the ability to breathe fire, and there are many realms where elements play a vital role in the natural order and elementalists (those who practice elementalism) are not only commonplace, but perhaps even the majority. Jumper, if you ever wanted to become a walking natural disaster, a primordial being who has become one with one of the fundamental elements of nature, or simply never be burned while cooking on a stovetop again, you’ve come to the right place...