Your pact enhances your psionics even as it taints your mind.
Prerequisites
Fiendish Pact, ability to manifest 2nd-level psionic powers.
Benefit
When you manifest a psionic power, you can spend a use of your Fiendish Pact to increase the manifester level by 1 and gain 1 temporary power point which is spent to augment that power beyond its normal power point cost. The power gains the [Evil] descriptor. You must declare you are using this ability before the power is manifested.
If the power targets a creature with the (Good) subtype, you gain a profane bonus equal to the number of Fiendish Feats you possess on any check to overcome its power resistance.