Mind Strike

 
Prerequisite(s): Ability to generate a mind blade, psychic strike +1d8.
 
Benefit:: If you expend your psionic focus when you imbue your mind blade with a psychic strike, the destructive energy instilled in your blade deals one more die of damage. For example, when a 7th-level soulknife charges his blade with a psychic strike in conjunction with expending his psionic focus, the damage potential of the blade is +3d8 points (instead of +2d8 points).
 
Source: Complete Psionic