Psionic

From The unofficial Dark Sun wiki

Psionics are a supernatural force that is prominent in the world. Psionics draw upon the user’s own inner resources to produce extraordinary effects.
Psionics are one of the cornerstones of Athasian life and society. Most living things possess some ability to use psionics, and all have developed at least minimal defenses against it. In civilized regions, psionics have become a tool for advancement and political survival.
Athasians call innate psionic ability “the Will,” though psionicists also refer to their reserve of mental strength with this term. The study of psionics and the refinement of psionic ability is called “the Way.” While the Will makes the use of psionics possible, only through the Way can a person truly master the powers of his mind.