You become angry and flustered under stressful circumstances.
- Effect: If you suffer any damage during combat, you must make a DC 15+ 1/2 your character level Will save or become enraged. While enraged you suffer a -2 penalty to your AC and cannot use any Charisma -, Dexterity -, or Intelligence-based skills (except Balance, Escape Artist, Intimidate, and Ride), the Concentration skill, or any abilities that require patience or concentration. You cannot cast spells or activate magic items that require a command word, a spell trigger (such as wands), or a spell completion (such as a scroll) to function. You can use any feat you posses except Combat Expertise, item creation feats, and metamagic feats.
This enraged stats lasts for a number of rounds equal to 3 + your Constitution modifier. This penalty stacks with those from the barbarian rage ability, resulting in a -4 AC penalty.