Magic

Magic in Society
Approximately 20% of the world's population have a natural attunement, and to only one magic element. Currently, no one knows what gives humans the natural ability to use magic, nor what doesn't.

Elements

 * Earth
 * Metal
 * Lightning
 * Fire
 * Water
 * Ice
 * Darkness
 * Light
 * Wind

Source
Just like the air that is breathed, it is found everywhere, in the aether. Scientists know it's there, but it can not be seen.

Technique
To cast magic, the user must chant an incantation while simultaneously performing hand gestures (human sign-language).

Cost
Casting a spell drains the user's stamina. Naturally, the bigger the spell, the more stamina is used.