Your attacks have become even deadlier.
Benefit: When using the Assassin trance, you deal sneak attack as a rogue of half your psychic warrior level. Your target must be eligible for sneak attack (not immune to precision-based damage, flanked, denied a Dexterity bonus, etc). In addition, when using the Assassin maneuver, your opponent must make a Fortitude save (DC equal to 10 + your base attack bonus) or be staggered for a number of rounds equal to your Wisdom modifier.
Psionics Expanded: Advanced Psionics Guide. Copyright 2011, Dreamscarred Press; Authors: Jeremy Smith and Andreas Rönnqvist.