Favorite Psionics System/Power

The 8th day of #30DaysofDarkSun is here and the question is "What is your Favorite Psionics System/Power?".

The unique system for psionics that was released in the Will and the Way of Constructs and Harbingers was fantastic. It really brought the fiction that Troy Denning gave us in the Prism Pentad to life in the game. Sure, it was all a little arcane, but it was fun! Of course it essentially splits the party as psionic combat becomes fairly separate from regular combat, but it was still interesting. How could you keep psionic combat separate, but still include it in the flow of physical combat in the game smoothly?

Robert Schwalb,designer for 4th edition Dark Sun and creator of Shadow of the Demon Lord, had this to say, "The 2nd Edition rules with the Will and the Way expansion blew up my skirt. Psionics felt big and interesting, with plenty of fun options to explore. "