Zealous (3.5e Trait)
From D&D Wiki
You have a drive to win battles with ardent determination.
Benefit: Once per day, as a swift action, you gain a +2 to attack, damage, or saves for 10 consecutive rounds.
Drawback: You loath to retreat from battle. Any battle you retreat from you gain a -2 to all rolls within combat for 24 hours.
Roleplaying Ideas: Your character is very driven for success in battle. These battles could be a duel to the death or for honor, or even a large scale war. The very thought of retreat makes you sickened. Retreating from battle will haunt you until you can feel that you have atoned for your failure in battle.