Combat Manifestation

(Expanded Psionics Handbook, page 44, DnD 3.5)

[Psionic]

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) or while you are grappling or pinned.