Psionicist

All intelligent beings possess self-awareness, the core
of sentience. What many do not realize, however,
is that this nascent consciousness is a form of
psychic energy. Different people value varying
aspects of this energy, whether Charisma, Intelligence,
or Wisdom, for their applications in certain professions
in the world, but it is the sum of these and other unnamed
facets of consciousness that contributes to psionic potential.
Those who decide to build on this holistic potential are called
psionicists.

For more mind-blowing details: PSIONICIST

Sidenote

All characters have at least 1 psionic ability in Athas, but psionicists are the only classes that can learn more. All other classes get 1 psionic attack or defence, with extra according to their intelligence modifier, but are only able to use one of them per day.

Psionicist

The Burnt World of Athas bsavoie10