Combat Manifestation

Type: Psionic
Source: Expanded Psionics Handbook

You are adept at manifesting powers in combat.
Benefit: You get a +4 bonus on Concentration checks made to manifest a power or use a psi-like ability while on the defensive (see Manifesting Powers on the Defensive, page 54, Expanded Psionics) or while you are grappling or pinned.