PSIONICS
A monster that casts spells using only the power of its mind has the psionics tag added to its Spellcasting or Innate Spellcasting special trait. This tag carries no special rules of its own, but other parts of the game might refer to it. A monster that has this tag typically doesn't require any components to cast its spells.
Ich würd das ja ganz anders machen.Gibt's schon fix und fertig im DMG S.288f.
Powers, die so funzen wie Zauber, nur dass sie halt nicht aus Slots gecastet werden sondern mit Power Points.
Um die geeignete PP-Progression zu finden, muss man halt eruieren, wie mächtig Zauber verschiedener Grade relativ zueinander sind.