"Dragon" Magazine issue #174 included "Are You Having Bad Thoughts?" an article by Ravenloft designer Bruce Nesmith that details how psionics work in the Demiplane of Dread. The power selection for the psionicist class was later expanded by the card-based "Deck of Psionic Might" supplement. The Dark Sun campaign setting used psionics as a core part of its setting's rules; in the world of Athas (home to the Dark Sun setting), every character and most monsters possessed some psionic wild talent, and all Dark Sun campaign PCs have at least one psionic talent, as described in "The Complete Psionics Handbook". Several "Dark Sun" products introduced new psionic powers.