3e SRD:Psychic Bastion
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Psychic Bastion [Psionic]
Benefit: The character gains +1 mental hardness against a foes successful psionic attack when he or she pays the cost of 3 power points. The character decides whether or not to pay the cost after determining the failure or success of the psionic attack to breach his or her Will save.
Special: A character can gain this feat multiple times, each time gaining bonus mental hardness equal to the previous bonus +1, but the character must pay a cost equal to the previous cost + 8. The character decides what mental hardness increment to use within the range granted by gaining this feat multiple times.