You are an expert at avoiding distractions and focusing your mind, and you can concentrate clearly even in the most stressful conditions.
Prerequisite: Concentration 8 ranks.
Benefit: You can always take 10 on Concentration checks, even when conditions would not normally allow you to do so.
Normal: A character cannot take 10 on any skill check if distracted or threatened, such as during combat.
Source: Races of Stone, page 144.