You wreath your weapon in manifested psychic energy.
Prerequisites
Psionic Weapon, base attack bonus +4.
Benefit
To use this feat, you must expend your psionic focus.
A weapon you wield (including a natural attack) is wreathed in psychic energy converting its physical damage (bludgeoning, piercing, and slashing) into energy damage of the same type as your active energy type. This affects all physical damage dealt by the attack but has no effect on other sources of energy damage (such as the Flaming enchantment).
In addition, if you make a successful critical hit, your weapon bursts with energy, dealing an extra 1d10 points of energy damage to the target of the attack.
You must decide whether or not to use this feat prior to making an attack. If your attack misses, you still expend your psionic focus.