Improved Critical

From NWN2Wiki

Type of feat: General

Prerequisite: Proficiency with the chosen weapon, base attack bonus +8 or higher

Required for: Overwhelming Critical

Specifics: Combat ability doubles the critical threat range with a given weapon. A longsword that normally threatens a critical on a roll of 19-20 would now threaten a critical on a roll of 17-20.

Use: Automatic. The threat range of a Keen weapon is already doubled, and is not further improved with this feat. This feat can be selected multiple times, applying to a new weapon category each time.

Special: With Mask of the Betrayer, one may take Improved Critical for melee touch attacks and ranged touch attacks.