Psionic Magic is the magic of force of will. The psionist uses his "mana" (Psionic Strength Points) to focus his own mind to affect the world around him. Due to this, the psionist disciplines are far more difficult to defend against than any other magic. With limited healing to them selves only the psionist class offers a difference that the other spell classes do not. Psionic "Spells" are not considered similar to the other 12 schools of magic, and are refered to as "Disciplines" rather than spells. Regardless of this, Psionics and the Psionic Disciplines are classified with the rest of the Magic systems as it's own School of Magic.
Psionics is obtained by purchasing Psionic Disciplines.