Githzerai Feedback( Complete Psionic, p. 54)
You can leverage your inertial armor psi-like ability to further insulate yourself from harm.
Githzerai, Inertial armor psi-like ability,
You can expend one or more of your daily uses of the inertial armor psi-like ability granted by your githzerai heritage to instead gain the use of biofeedback as a psi-like ability. Your manifester level for this effect is equal to 1/2 your Hit Dice (minimum 1st).