Psionics have always been a part of the Dark Sun setting. Within the cultures of Athas psionics are referred to as the Way of the Unseen. They are a utilization of inner power, a blending of the physical and spiritual energies to create fantastic effects.
Here are a few thoughts on what psionic pieces from previous editions should included in 5th edition D&D.
Getting inside Psionics for 5th edition D&D
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