Born to Rule (3.5e Feat)
From D&D Wiki
 Born to Rule [Racial, Fighter]
In addition, all opponents within thirty feet of you must make a Fortitude save DC 10 + BAB or become shaken, gaining a –2 penalty on attack rolls, saving throws, skill checks, and ability checks. This effect lasts for a number of rounds equal to your Base Attack Bonus.These penalties do not stack with themselves, but may stack with other penalties.