You are able to siphon off residual psychic impressions to recharge your psychic strike from fallen foes.
Prerequisites
Psychic strike +1d8.
Benefit
Once per round when you reduce a foe to 0 hit points or less, you may imbue your mind blade with your psychic strike as a free action. Foes slain in such a manner must possess an Intelligence score of 3 or more for you to be able to use this feat.